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Objectives: Coronary artery fistulas (CAFs) are rare congenital anomalies with an occurrence rate of 0.002-0.3%.

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The intricate relationship between sports participation and cardiac arrhythmias is a key focus of cardiovascular research. Physical activity, integral to preventing atherosclerotic cardiovascular disease, induces structural, functional, and electrical changes in the heart, potentially triggering arrhythmias, particularly atrial fibrillation (AF). Despite the cardiovascular benefits, the optimal exercise amount remains unclear, revealing a J-shaped association between AF and exercise.

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Exercise-induced complete atrioventricular block resulting in cardiac arrest: a case report and review of diagnostic strategies.

Eur Heart J Case Rep

July 2024

Graduate Program in Cardiology and Cardiovascular Sciences, School of Medicine, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.

Background: Exercise-induced complete atrioventricular block (EIAVB) is a rare cardiac conduction abnormality presenting challenges in diagnosis due to non-specific symptoms such as exertional dyspnoea, dizziness, and syncope.

Case Summary: We present a case of a 76-year-old female with recurrent exercise-associated syncope. Non-invasive exercise testing played a crucial role in diagnosing her condition, revealing EIAVB and underscoring its importance in patients with cardiovascular risk factors.

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Case Report: Multimodality evaluation and clinical management of a single coronary artery.

Front Cardiovasc Med

January 2024

Division of Cardiovascular Imaging, Department of Radiology, University of Florida, Gainesville, FL, United States.

A 14-year-old male with no significant medical history presented with intermittent palpitations for 2-3 months that occurred at rest and were associated with light-headedness. Electrocardiogram in clinic showed sinus arrhythmia with early repolarization and no ischemic changes. The echocardiogram showed normal cardiac structure and function, however, there was a concern for possible anomalous origin of the left coronary artery.

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Exercise-induced tachycardia-dependent atrioventricular block with a normal electrocardiogram at rest is rare. Herein, we present a case of a 65-year-old woman with exercise-related chest suppression and treadmill exercise test-induced second- and third-degree atrioventricular blocks with narrow QRS wave and normal resting electrocardiogram. High atrioventricular block leads to tissue and organ insufficiency, resulting in exercise intolerance, dyspnea, dizziness, and syncope.

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