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The presence of atrioventricular accessory pathway can cause heart failure due to the disorder of cardiac depolarization sequence: a case report
Babak Payami, Shirin Azizidoost , Naem Mansouri ,
Volume 81, Issue 10 (1-2024)
Abstract
Background: Wolff-Parkinson-White syndrome is a rare but well-known disease that predisposes a person to cardiac arrhythmias. But sometimes this syndrome is accompanied by heart failure in the affected person. Several causes have been proposed for this complication including recurrent or incessant tachyarrhythmias that are frequently found in symptomatic (especially children) Wolf-Parkinson-White syndrome patients causing heart dysfunction and dilation and dilated cardiomyopathy, and also pre-excitation-related dyssynchrony leading to progressive ventricular remodeling and dilation. In this report, a patient is introduced who has improved his heart failure by radio-frequency ablation of free wall type of this syndrome.
Case Presentation: A 35-year-old man who had a history of Wolff-Parkinson-White syndrome from 8 years ago and suffered from dilatation and reduced left ventricular ejection fraction in recent years was presented with a pre-excited atrial fibrillation attack at the emergency department. The initial surface ECG showed positive delta wave in all precordial leads and negative QRS complexes in interior leads with QRS duration of about 200 ms. He had undergone electrophysiology study and ablation at the left postero-lateral accessory pathway. After ablation of accessory pathway within the months (from November 2022 until June 2023), left ventricular function was gradually improved and the symptoms of the patient's shortness of breath were also decreased.
Conclusion: The existence of heart failure in patients with Wolff-Parkinson-White syndrome can be due to various reasons including the presence of an accessory pathway and the dyssynchrony of intraventricular contraction which is caused by premature excitation of the connected part of the left ventricle by accessory atrioventricular pathway. Although in order to rule out the possibility of the incidental association of the accessory pathway with primary dilated cardiomyopathy and to investigate the segmental dyskinesia, it is necessary to perform diagnostic measures such as echocardiography and cardiac computerized tomography and magnetic resonance imaging, ablation of such accessory pathway not only controls arrhythmic attacks but also leads to the improvement of the left ventricular systolic function even in a middle age patient.

Investigation of risk factors for death in heart failure patients at Shahid Mustafa Khomeini Hospital
Firooz Balavandi, Hossein Moradkhani,
Volume 82, Issue 10 (1-2025)
Abstract
Background: Chronic heart failure (CHF) is a leading cause of cardiovascular mortality and hospitalization. Heart failure (HF) imposes both direct costs to healthcare systems and indirect costs to society through complications, unpaid care costs, premature mortality, and loss of productivity. The aim of the present study was to investigate the quality of care, laboratory and clinical indicators affecting mortality in heart failure patients.
Methods: In a descriptive study conducted in the summer of 1402, data were collected by extracting the list of patients who died with a diagnosis of heart failure from the hospital's information management system, based on random sampling, and recorded in a checklist. The number of patients selected was from a study of factors affecting mortality in heart failure patients at Shahid Mustafa Khomeini Hospital.
Results: 25.8% of patients had bilateral rales on pulmonary auscultation, and 88.7% of them reported shortness of breath, 58.1% edema, and 22.6% chest pain. LVEF of most patients was 10-25. With a decrease in systolic blood pressure and an increase in diastolic and HR, the probability of mortality increased significantly (1.058, 0.932, and 0.983) times, respectively. With a decrease in oxygen level, the probability of mortality increased significantly by 0.983 times. The mean ALT and AST increased significantly and the mean HCT also decreased significantly. With each unit increase in ALT and AST and each unit decrease in Hct, the probability of mortality increased (1.008, 0.985 and 1.283) times, respectively. With the decrease in Hb and FBS and the increase in Cr and BUN, the probability of mortality increased by 0.314, 1.013, 1.884 and 0.969 times, respectively. However, no significant relationship was observed between mortality and the factors Hb, FBS, Cr and BUN with patient mortality.
Conclusion: Dyspnea and edema were common in patients, and bilateral rales and chest pain were observed in less than half of the patients. A decrease in systolic blood pressure and an increase in diastolic and HR significantly increased the probability of mortality. A decrease in oxygen levels also significantly increased mortality in patients.

Evaluation of the relationship between changes in serum troponin level and asymptomatic hypotension during hemodialysis in patients with advanced renal failure
Omolbanin Taziki, Nadia Jamal,
Volume 83, Issue 1 (4-2025)
Abstract
Background: Asymptomatic hypotension is a common complication in patients undergoing hemodialysis, which can lead to serious consequences. Troponin I, as a biochemical marker for myocardial injury, may play a role in the diagnosis and management of this complication. This study aimed to investigate the relationship between serum troponin I level changes and asymptomatic hypotension in patients with advanced kidney failure undergoing hemodialysis.
Methods: In this cross-sectional study, 120 adult ESRD patients (aged 30–80 years) with an ejection fraction (EF) >50% who attended the hemodialysis unit of Shohada Tajrish Hospital over a 6-month period starting 15 January 2024 were enrolled. Demographic and clinical data were collected using a checklist. Serum troponin I levels were measured before and after dialysis, and patients' blood pressure was recorded throughout dialysis sessions. For quantitative variables, mean and standard deviation were reported; for qualitative variables, absolute and relative frequencies were presented. Statistical analysis was performed using the Paired t-test, Independent t-test, Pearson correlation coefficient, and their non-parametric equivalents as appropriate. A significance level of p < 0.05 was considered statistically significant.
.Results: A total of 120 patients were examined, with a mean age of 57.6 ± 7.1 years. The gender distribution was 67 males (55.8%) and 53 females (44.2%). The mean body mass index was 20.73 ± 0.98. Significant differences were found in mean blood pressure, heart rate, body weight, and changes before and after dialysis (P<0.05). These differences included a decrease in blood pressure, and body weight, an increase in heart rate, and an increase in troponin levels. No significant relationship was found between troponin changes before and after dialysis with age, gender, height, weight, body mass index, heart rate, average duration of dialysis, and other laboratory variables (P>0.05). However, a significant correlation was found between troponin changes and blood pressure changes, indicating that as troponin levels increased, the mean blood pressure of patients decreased.
Conclusion: The findings of this study indicate a significant relationship between increased serum troponin I levels and asymptomatic hypotension in patients with advanced kidney failure undergoing hemodialysis. These results may be useful in identifying at-risk patients and improving therapeutic management. Further research is needed to confirm this relationship and explore its underlying mechanisms.
 

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