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Repetitive ventricular fibrillation preceded by both ST segment depression and elevation during acute myocardial
E Rechavia1, A Sagie, J Kusniec
1Israel and Ione Massada Center for Heart Diseases, Beilinson Medical Center, Petah Tikva, Israel.
Insights
Repetitive ventricular fibrillation occurred in a patient due to alternating ST segment changes. This suggests critical coronary artery occlusion episodes causing lethal arrhythmias.
Area of Science:
- Cardiology
- Electrophysiology
- Ischemic Heart Disease
Background:
- Ventricular fibrillation (VF) is a life-threatening arrhythmia.
- ST segment changes on electrocardiogram (ECG) can indicate myocardial ischemia.
Observation:
- A patient presented with recurrent episodes of ventricular fibrillation.
- Electrocardiogram revealed alternating ST segment depression and elevation in precordial leads.
- These ECG changes correlated with periods of subendocardial and transmural ischemia.
Findings:
- The observed ECG patterns suggest consecutive subtotal and total coronary artery occlusions.
- Both occlusion types were critical, precipitating lethal ventricular fibrillation.
- Ischemia-specific ECG changes were localized to precordial leads.
Implications:
- This case highlights a potential mechanism for recurrent VF in acute coronary syndromes.
- Understanding these specific ECG manifestations can aid in diagnosing critical coronary events.
- Further research into the electrophysiological consequences of dynamic coronary occlusion is warranted.
Abstract:
A patient had repetitive ventricular fibrillation preceded by alternating ST segment depression and elevation. The ECG changes were confined to the precordial leads only, reflecting subendocardial and transmural ischemia, respectively. It is speculated that the patient exhibited consecutive episodes of subtotal and total coronary occlusion, both episodes being critical enough to induce lethal arrhythmias.