Showing 749 results for AF
Ghafarnezhad M, Shams Mr,
Volume 58, Issue 2 (7 2000)
Abstract
Asymptomatic bacteriuria is prevalent during pregnancy. It can lead to pyelonephritis, premature pregnancy and low birth weight. In this prospective study, to determine prevalence and risk factors of asymptomatic bacteriuria, 205 consecutive pregnant women who visited our prenatal care clinic in Mirza-Koochakkhan Hospital and had no urinary symptom were entered. Patients data were recorded using a questionnaire and urine samples were obtained for urinalysis and urine culture. We analysed data by using fisher exact and chi-squared test. 14 cases had positive urine culture (6.8%). Significant correlation was seen between asymptomatic bacteriuria and age, parity, past history of kidney stone, pyelonephritis, urinary tract infection, preterm delivery and pyuria pvalue <0.05. We suggest routine urine culture in first visit of high risk and 16th week of low risk pregnancies.
Keihani M, Shafaeian B, Ahmadi J, Atarchi Z,
Volume 58, Issue 4 (8 2000)
Abstract
Thrombotic thrombocytopenic purpura is the result of multiple thrombus disseminated in small arterioles throughout the body. Principle damage is in the endothelium of small vessels and capillaries. From 1982 to 1999, 28 patients (16 female and 12 male) have been treated for TTP. The outcome was evaluated for risk factors and prognosis. These patients were 18 to 69 years old. All had neurological sings, fever, microangiopathic hemolytic anemia and thrombocytopenia. These patients did not have predisposing factors. All patients were negative for hepatitis C and B. Plasmaphoresis was the main treatment in all and was done. The patients had plasmaphoresis from 1.5 to 6 liters per day. Minimum requirement was 4.5 liters to 95 liters in all. Replacement was fresh frozen plasma in 16 patients. 12 patient had FFP and cryopoor plasma half-and-half for replacement. 22 patients completed the treatment and became well 6 patients died. Chronic head ache and progressive dementia was observed in 2 patients. 6 patients did not recover and died. Platelets count over 100000/mm LDH lower than 500 units and disappearance of neurological disturbance was the end point of treatment. This study showed the good result of plasmaphoresis in TTP ad graves outcome in patient with cerebral bleeding, cardiopulmonary failure, prolonged QT in EKG, hypotension, and increased CPK. We did not observe any chronic cases in these groups. The cause of death were cerebral hemorrhage in 2 respiratory failure in 3 patients. One of the these patients had adult respiratory distress syndrome and pneumonia in another patient.
Hashemi H, Miraftab Sm,
Volume 59, Issue 1 (7 2001)
Abstract
PTK (Phototherapeutic Keratectomy) is the use of laser in corneal diseases. We can replace PTK for many other invasive procedures. The objective of this study is the assessment of this procedure in several cases in our practice. This investigation was a retrospective study, which was conducted based on comparison of 11 eyes with corneal eschars, induced by recurrent corneal erosions, pterygium surgery, corneal dystrophies and trachoma from 1994 to 1995. The mean age of cases was 32 years. The mean augmentation rate in hyperopia after one month was 1.5 diopter, and after one year it was 1 diopter. Although in two cases, the cylinder more than one diopter was induced, the mean rate for it was not increased significantly. One patient with recurrent erosion, who had not replied to any treatment, had no any complaint during one year follow up. During the follow up procedure, there were no any cases of vision loss among the patients.
Farzan M, Mostafavi A,
Volume 59, Issue 1 (7 2001)
Abstract
Between 1371 to 1379, of 10 patients with radial tunnel syndrome, 9 patients were treated by decompression of the posterior interosseous nerve. 8 patients were followed up more than 10 months. One patient improved without surgery. Half of the patients suffered from pain and all of them had variable degrees of paralysis in muscles innervated by deep branch of the radial nerve. The syndrome was diagnosed after an average of 26 months after onset of symptoms. 3 patients had associated endocrine disease and 2 patients suffered from another accompanied compression neuropathy. 8 patients performed strenuous, repetitive upper extremity tasks. EMG confirmed the diagnosis in all patients. The source of nerve entrapment was identified as the arcade of Frohse in 4 patients. Malignant soft tissue tumor was responsible for nerve compression in one patient. More than one pathologic site was responsible for nerve entrapment in another 4 patients. Of 8 patients with enough follow-up after operation, pain was improved in all, but paralysis was improved in only half of them. According to ritts criteria, results were good in 50% of patients and in 50% of patients results were bad. All bad results were due to persistence of paralysis in affected muscles. One of four patients who had no improvement in paralysis, was satisfied with surgical result because tendon transfer was performed at the time of nerve decompression. It is recommended that all possible sites of nerve compression in the radial tunnel be explored and released.
Ghlich Nia Omrani H, Ghaffar Poor M,
Volume 59, Issue 2 (5-2001)
Abstract
This syndrome is a very rare neurological presentation which was first reported by Susac in 1975, and usually involves the young women with triad of: (1) Visual loss due to occlusion of retinal artery branches. (2) Subacute encephalopathy with psychic manifestation, personality disorders, involvement of the cortico-spianal tracts, pseudo-bulbar, focal or generalized seizures and myoclonic jerks. (3) Bilateral sensory neural hearing loss with tinnitus. All of the symptoms and signs are pathologically due to microinfarcts. It's pathogenesis is unknown. Brain biopsy shows multiple microinfarctions. Diagnosis of this syndrome is based on the clinical tiard, retinal angiography and neuroimaging studies. In this report, a young lady of 25 years old was referred to neurology ward of Imam Khomeini Hospital with above mentioned symptoms an signes and was recognized as a case of this syndrome.
Abdollah Zadeh Hosseini Sm, Naviafar D,
Volume 59, Issue 3 (8 2001)
Abstract
In this study we tried to assess the incidence rate of shunt complications and it's association with age, sex, location of shunt, duration of surgery, and so on. For this purpose in a prospective study, 82 cases of hydrocephalus after shunt insertion, during the period of two years (1375-1377) in Shariati hospital were selected and all the complications were evaluated. From the patients, 39 cases were female and 43 were male. The range for age was 15 to 73 years with mean age of 16.67 years (SD=22.77). In 22 cases the complications of shunt surgery were observed. Shunt complications in our patients were infection (8.6 percent) and mechanical failure (17 percent). The mean duration of time for onset of complications was 3.11±4.3 months. The complication rate at the beginning (under two) and the end of life was much higher. In trying to reduce the rate of shunt complications, it is necessary to define and understand the causes of these problems they often arise from multifictorial etiologies.
Bagheri H, Akbari M, Olyaei Gh, Talebian S, Jafari F,
Volume 59, Issue 3 (8 2001)
Abstract
The aim of this investigation is to compare the effect of applying two transcutaneous electrical nerve stimulation (TENS) current with different frequencies (2 Hz & 100 Hz) on Hoffmann reflex recorded from gastrosoleus muscle of healthy people. Forty female subjects between 20 to 30 years of age were participated in this quasi-experimental design. Twenty of them were exposed to the 100 Hz current and the remaining 20 to 2 Hz current on dermatome S1 root. The excitability of the alpha motoneurone was measured by H-reflex amplitude (peak to peak max/2) before and after the application of the TENS current for 30 minutes. The reflex was recorded and at measured before (TO) and after the application of TENS at different times (T1, T% and T10) up to 10 minutes. The mean values were compared by multiple paired T test (alpha=0.00825). The results indicate a considerable decrement in Hoffmann reflex amplitude after application of 100 Hz current in comarison with that of before the application. The effect last for 10 minutes after the TENS application, whereas the application of 2 Hz current results in increment of the Hoffmann reflex amplitude. The 5 and 10 minutes interval test dose not show any significance and the results were attenuated befor 5 minutes. As a conclusion high frequency of TENS (100 Hz) has an inhibitory effect on excitability of alpha motor neurone reflex lasting for 10 minutes, while low frequency of TENS (2 Hz) has an facilatory effect on the same motoneurone with short lasting effect.
Ghlich Nia Omrani H, Ghaffar Poor M,
Volume 59, Issue 3 (8 2001)
Abstract
This syndrome is a very rare neurological presentation which was first reported by Susac in 1975, and usually involves the young women with triad of: (1) Visual loss due to occlusion of retinal artery branches. (2) Subacute encephalopathy with psychic manifestation, personality disorders, involvement of the cortico-spianal tracts, pseudo-bulbar, focal or generalized seizures and myoclonic jerks. (3) Bilateral sensory neural hearing loss with tinnitus. All of the symptoms and signs are pathologically due to microinfarcts. It's pathogenesis is unknown. Brain biopsy shows multiple microinfarctions. Diagnosis of this syndrome is based on the clinical tiard, retinal angiography and neuroimaging studies. In this report, a young lady of 25 years old was referred to neurology ward of Imam Khomeini Hospital with above mentioned symptoms an signes and was recognized as a case of this syndrome.
Lotfi J, Salimi Poor H, Nafisi Sh,
Volume 59, Issue 3 (8 2001)
Abstract
The study was conducted to determine the clinical pattern and etiology of cerebral venous thrombosis in Iran. Records of all adult patients admitted with a clinical diagnosis and MRI of cerebral venous thrombosis from 1993 through 1999 in three major hospitals of Tehran, Iran were reviewed. Fifty patients (39 women, 11 men) aged 14 to 56 years were identified. Headache the most frequent and often the earliest symptom, was encountered in 82 percent and papilledema, the most frequent sign in 56 percent of cases. Infection was the cause of cerebral venous thrombosis in 26 percent of our cases. Other causes included oral contraceptive (32 percent), vasculitis (6 percent), Behcet's disease (4 percent), postpartum state (4 percent), myeloproliferative disease (2 percent), ulcerative colitis (2 percent), antithrombin III deficiency (2 percent) and diabetic ketoacidosis (2 percent). Oral contraceptive was recognized as the most common etiology. Infection is an important cause whereas procoagulation disorders are uncommon.
Rafeian M,
Volume 59, Issue 4 (9 2001)
Abstract
Drug interaction may cause sever adverse drug reactions in patients. The high amounts of prescribed medication in hospitalized patients will cause higher incidence of drug interactions. Therefore, the study of drug interactions in hospitalized patients seems to be worth. We have, studied drug interaction in internal and surgical units, in Kashani hospital in Shahrekord. Factors included in this study were: mean of prescribed medications, frequency of drug interactions, correlation between these two parameters, and the most frequent drug interactions. The frequency of drug interactions in different units of hosital, was as follows: 26.4 percent in surgical unit, 30.7 percent in internal unit and 34 percent in cardiac unit. The mean of prescribed medications was as follows: 3.90 in surgical unit, 3.92 in internal unit and 5.86 in cardiac unit. There was a positive correlation between the number of medications and the frequency of drug interactions in prescriptions. Six different drug interactions, occurred frequently. Therefore, it seems if physicians consider these interactions, the percent of drug interactions would be reduced considerably. We also found that most of drug interactions occurred when two or more diseases were managed concurrently. Therefore, it seems, having attention to these cases, would cause drug interactions to be reduced significantly.
Sarraf Nejad A, Hoodei E, Siavoshi F, Maserrat S, Jadali Z, Shahrestani T,
Volume 59, Issue 4 (9 2001)
Abstract
Helicobacter pylori (H.pylori) is the most prominent causative agent of gastroduodenal diseases all over the world. Other manifestations such as urticaria and coronary heart diseases, also are suspected to be induced by H.pylori. Non invasive methods are preferred for diagnosis and ELISA, because of its reliability, speed, sensitivity and specificity is widely preferred as diagnostic tool. Previously we have used IFA, and here, we report an indirect ELISA technique for H.pylori diagnosis. First, 9 strains, of H.pylori isolated from biopsies, were cultured, and the soluble crude antigen was used to coat ELISA plates. Antigen concentration and conjugated antiserum dilution were optimised using checker board method. In this study the gold standard was: rapid urease test, culture and direct smear. Patient serum dillution and the cut-off value was determind, using 22 negative and 30 positive confirmed samples according to ROC curve and the results were compared with a commercial kit. The sensitivity and specificity of this method were 93.2 percent and 95.4 percent respectively. A commercial ELISA Kit, was used and compared simultaneously. The sensitivity and specificity were 87.8 percent and 73 percent respectively. Therefore, regarding the acceptable sensitivity and specificity, ease of work of ELISA, being economical and non-invasive, it can be employed in diagnosis of H.pylori infection and also in epidemiological studies.
Ensani F, Mozaffari K,
Volume 59, Issue 5 (9 2001)
Abstract
Nodules in the thyroid have always commanded a great deal of attention because of the fear of their being cancerous. The estimated incidence of thyroid nodules in children and young adults is about 0.22 to 1.8 percent. According to different epidemiological data, about 10 to 35 percent of thyroid cancers occur in the first two decades. The present study based on microscopic review of tissue slides obtained from thyroid nodules in cancer institute during 24 years focusing on malignant lesions in the mentioned age group revealed the following results: The average age of patients was 16.5. The female to male ratio is about 3.3/1 (76.7 percent female and 23.3 percent male). About 84 percent of thyroid nodules were benign with the following incidence of different morphologic features: nodular goiter 78.6 percent, follicular adenoma 1.96 percent, 16 percent of thyroid nodules were malignant with the following incidence of different morphologic variants: papillary CA 91.3 percent, follicular CA 3.5 percent and medullary CA 5.2 percent. Papillary carcinoma as the predominant from of thyroid cancer was accompanied by unilateral cervical lymph node metastasis in 53.8 percent of cases and distant metastasis (to lung) just in one case. According to major variation of papillary carcinoma, we found the classic type in 33 cases, the follicular variant in 18 cases and micro carcinoma in one case. Based on the above results once again we reach this belief that every thyroid nodule especially in children and young adults demands careful appraisal.
Ghazi Saeidi K, Jafari Javid M, Khazaei Koohpahr M,
Volume 59, Issue 5 (9 2001)
Abstract
Postoperative nausea and vomiting is a common complication that all anesthesiologist are familiar with the problems of its consequences. Although continued research on the recognition of factors affecting the incidence of PONV is being done but they are not sufficient and the need for research along with advances in anesthesiology and newer drugs are considered. In this prospective cohort study 400 children of 3 to 12 age who has been operated for general surgery (other than eye, thorax and upper abdomen) and orthopedic surgery in the Imam Khomeini and Children Medical Center Hospital has been evaluated. Of these, 200 children who had smoking parent and according to definition were passive smokers and the other 200 children had no smoking parents. Both the groups were matched for sex, age, and type of operation. With the analysis of data we noted that the incidence of PONV in both groups was 19.5 and there was no significant difference between the two groups. (Passive smoker 19 percent and non-passive smoker 20 percent). We also noted a relation between the duration and the incidence of PONV. So operation with more than 2 hours had higher incidence of PONV. There was also positive relation between PONV and controlled ventilation. However, there was no significant difference as the sex and type of operation was concerned. In conclusion, children of smoker parents suffer more PONV than children of non-smoker parents if operation takes longer than two hours or the patient is mechanically ventilated during operation.
Najafi Mr, Tamizi Far B,
Volume 59, Issue 5 (9 2001)
Abstract
The use of Antiepileptic drugs (AEDs) in children may be associated with adverse effects especially behavioral and cognitive and teratogenic potential effects. The main propose of this study was to find an answer to the question of which factors in EEG of patients before AED withdrawal could have prognostic role in our decision. We studied 106 children whom their medication had been withdrawn 2 years after their last seizure. Before starting of this, an EEG was recorded and interpreted by an expert neurologist. Many variables such as background activity, focal spike, generalized sharp and spik waves, focal slowing, in comparison with the EEG of patient at the time of diagnosis, and also final result of the trace interpret also examined. Follow-up visits were scheduled every 3 months at least for one year. If seizure relapsed, AEDs was resumed and follow up terminated. The overall probability of remaining seizure free was analyzed as a function of time by Kaplan-Meier survical analysis. Prognostic factors affecting seizure relapse were evaluated by using the log-rank test. The overall probability of seizure recurrences was 24.8 percent (95 percent C.I, 22.5 to 28.5) at 12 months. EEG comparisons with previous times were a significant factor for prediction of relapses. Relative risk of this factor was about 1.98 (95 percent C.I, 1.01 to 3.91) (P<0.05). We found that EEG interpretation at the time of diagnosis was not a significant factor but if it divided by sex, there is a significant difference in gender (P=0.06). According to our study the rate of AED withdrawal in children is small. The benefits of continuing AED therapy must be weighted against the risk of potential adverse effects. EEG comparison with previous traces could be evaluated as a prognostic factor before AED withdrawal in children.
M Afshar, H Hoseinian Moghadam,
Volume 59, Issue 6 (11-2001)
Abstract
One method of drug smuggling is body packing or body stuffing, placement of narcotics (opium, heroin, hashish, …) inside intestinal tract for transfer from city to city or country to country. Estimating of the methods for transferring, content of packets, packaging, cause of death and results of diagnostic and therapeutic methods can effectively decrease the number of body packer and law execution. This study is case series by randomized sampling. Several parameters such as sex, age, marital status, addiction, job, level of education, type of opioids and their weight and number of packets, result of abdominal X-ray, surgery needs, were collected from April 1999 to December 2000. Through this period of time, 32 male smuggler who had swallowed drug packets were detained. The average age was 41 years (max=62, min=20). The minimum weight of the opium carried by this smugglers was below 20 gram and maximum weight was 1000 grams (median=360 grams). The minimum number of packets were one packet and maximum number of packets were 54 (median=10 packets). In 84 percent of body smugglers the content of packets was opium, 13 percent was heroin and 3 percent was hashish. From the cases, 81 percent of smugglers were addicts themselves. Death occurred in 7 cases from which 3 were after surgery.
Af Zand Parsa,
Volume 59, Issue 6 (11-2001)
Abstract
In the past, coronary artery bypass grafting was the treatment of choice for patients with symptomatic multi vessel coronary artery disease, but in recent years per cutaneous transluminal coronary angioplasty (PTCA) accepted as an alternative approach to revascularization. To assess the initial success and in hospital results of coronary angioplasty of more than one lesion per procedure in patients with multi vessel coronary artery disease, a retrospective analysis of patients who underwent selective coronary angioplasty at Imam Khomeini medical center from 1994-1997 were peformed. From 1994 to 1997 per cutaneous transluminal coronary angioplasty (PTCA) were done in 257 patients, that 201 (78.2 percent) were male and their age range 23-73 years. The numbers of patients with multi vessel coronary artery disease were 98 (38.13 percent), that complete revascularization (PTCA of more than one lesion per procedure) underwent in 34 (13.58 percent) of them (27 men, 7 women, age: mean±SD 48±9.8 range 30-70). A total of 71 lesions were tried, that 22 (31 percent) were type A, 45 (63.4 percent) were type B, and 4 (5.6 percent) were type C. Among patients 21 (61.8 percent) had unstable angina and 13 (38.2 percent) had stable angina. Procedures were successful in 68 (95.8 percent) of lesions and 31 (91.2 percent) patients were discharged fro procedural complications included 3 (8.8 percent) non-Q wave myocardial infarction and no mortality. Without any complication, (success defined as residual stenosis <50 percent). As a conclusion, in selected patients with multi vessel coronary artery disease PTCA of more than one lesion per-procedure is effective and safe.
Ghaffar Poor M, Ghelichnia Omrani Omrani H, Saber Tehrani Mm, Ghanaati H,
Volume 60, Issue 1 (13 2002)
Abstract
Low back pain is among the most frequent medical complaints and a major public health problem. 1.7 percent of cases are caused by herniated disc, 20 percent of which require interventional treatment. Percutaneous laser disc decompression (P.L.DD) can be considered as an effective therapeutic alternative in certain cases.
Materials and Methods: To determine the efficacy of this method in Iran in patient's with low back pain due to disc herniation, 40 patients according to medical history, physical examination and MRI findings were selected for this study. Patients who had canal stenosis, marginal, osteophyte, advanced disc dehydration, ruptured posterior ligament and other contraindication were excluded. CT scan was used only for needle navigation. After proper positioning of needle, nucleous pulposus was evapourated with Nd-YAG laser. Total energy was 1200-1600j. The procedure was done out patient and follow up has been done at 1 day, 1 week, 1,3, 6 and 12 months.
Results: There was no serious complication. 80 percent of patients in one-year follow up showed significant clinical improvement.
Conclusion: Our findings suggests that percutaneous laser disc decompression can be considered as an effective alternative method of treatment for disc herniation and patient selection is the critical factor which determines success rate.
Zafarghandy Mr, Nasiri Sheikhani N,
Volume 60, Issue 1 (13 2002)
Abstract
"Arterial Thromboembolism" is the most common cause of "Acute Arterial Ischemia" of extremities. In this study, It is attempted to collect retrospectively some documentary information of all "acute arterial thromboembolic occlusions of the limbs".
Materials and Methods: In descriptive retrograde study in Sina General hospital, all related records in this regard were collected from March 1991 to March 1997. To reveal the statistical outcomes and analysis the associations between them as well, the statistical tests like nonparametric ones were employed.
Results: Total number of the cases was 24 with " Acute Thromboembolic Arterial limb Ischemia" (3 in upper and 21 in lower limbs). The results were as follows: Female to male ratio =1/2, "Range of Age": 34-91, "Mode"=8th decade of life, "Mean"-64.48, "Etiology" Cardiac Origin in majority of cases ("A.F" in 57 percent) and Unknown Origin in 1/4 of cases. "Pain" was find in 95 percent, Grade HI ischemia in only 38 percent of patients on presentation and the others in Grade n. The most common "site of embolic occlusion" was "Femoral Ar." (76 percent). "Simultaneous Embolic Events" were fined in 29 percent. "Embolectomy" was performed in 79 percent (84 percent success rate) and "Primary Amputation" in 12.5 percent. "In hospital Mortality Rate" was fined in 24 percent and "Limb Salvage rate" in 68 percent. In conclusion, there were some logic relationship only between "Limb Salvage rate" and "Ischemic Grading" and also "Delayed diagnosis". There was also some significant direct relationship between "Mortality rate" and "Concomitant Embolic events".
Conclusion: This study was an explorative one that paves the way for further complementary investigations. Although there are many recommendations due to upgrading knowledge, attitude and practice of physicians as well as lay people Besides, the upgrading of educational and curative facilities should not be neglected.
Firoozbakhsh Sh, Safavi E, Zahed Poor Anaraki Mr, Derakhshan Deilami Gr ,
Volume 60, Issue 3 (14 2002)
Abstract
Background: Transbronchial lung biopsy (TBLB) is an attractive alternative to open lung biopsy as an initial diagnostic procedure for patients with diffuse parenchymal disease or localized densities beyond direct endoscopic vision. TBLB can be carried out safely without fluoroscopy in patients with diffuse lung disease. Since in our bronchoscopic department fluoroscopy is not available, we planned to evaluate the blind (without fluoroscopic guide) TBLB being performed in our department to determine the success rate in obtaining lung tissue, the sensitivity of the procedure and the risk of complications.
Materials and Methods: Sixty-Four TBLB were done in our department during a 6 month period (March-September 1999).
Results: Lung tissue wasn’t detected in two (3.1 percent) samples. Pathological results were helpful in 46 (71.9 percent) cases. No evidence of hemoptysis was found after the procedure. Three (4.68 percent) cases of pneumothorax was detected. Only one of them required chest tube (1.51 percent).
Conclusion: We concluded that blind TBLB was successful in our department with rates of complications comparable to other approved centers.
Ziaee V, Kordi R, Alizadeh R, Afsharjoo Hr, Yunessian M, Halabchi F ,
Volume 60, Issue 3 (14 2002)
Abstract
Background: To determine the incidence and risk factors of acute mountain sickness (A - AMS) in pilgrims. Although it is well known that western trekkers suffer from acute mountain sickness (AMS) in other mountains, not much is documented about the incidence of AMS in the Damavand Mountains, Iranian population that go to high altitude and its related contributing factors.
Materials and Methods: The design was a cross sectional study. During six weeks (in summer 2000) a population of 459 pilgrims was studied. The period of the study was six weeks in summer AMS symptoms, were assessed by an extensively used standard questionnaier (Lake Louise), applied at 2900 m, after than arrive at 4200 m above sea level, and during descent from summit Damavand (at 4200 m) at Damavand in Iran Alborz Mountain.
Results: The overall incidence of A.M.S. was 60.8 percent. Climbers had 13-71 years and 67.8 percent of the study population was men. Men did not differ significantly higher rate of AMS from women. The incidence being increased in those who residence at an altitude below 600 m, climbed fast, amateur climbers, a previous AMS experience or high altitude illness, a history of AMS at ascent to Damavand and ascent time at night (6pm-6am). It was weakly dependent to rate of ascent (from 2800 m up 4200 m less that 4 hours) and sleep in 4200 m. The incidence of AMS was unrelated to sex, age, body mass index (BMI), height, weight, smoking, to the load carried and knapsack and spent more than 15 hours in shelter (at 4200 m). So it was independent of rate of ascent in the higher altitude (from 4200 m to 5671 m), speed of descent and family history of AMS.
Conclusions: Data show a strong relation between experiences mountaineer, history of AMS, ascent time at night and the incidence of acute mountain sickness in 459 climbers studied at high altitudes that didn’t report previously.
