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Angiographic findigs and prognostic indicators in patients resuscitated from sudden cardiac death
Insights
Patients resuscitated from ventricular fibrillation (VF) with severe coronary artery disease (CAD) face high recurrence risk. Angiographic findings like triple vessel CAD and reduced ejection fraction predict these high-risk individuals.
Area of Science:
- Cardiology
- Interventional Cardiology
- Cardiac Electrophysiology
Background:
- Out-of-hospital ventricular fibrillation (VF) poses a significant risk in patients with coronary artery disease (CAD).
- Understanding prognostic factors is crucial for managing patients post-resuscitation from VF.
Purpose of the Study:
- To identify clinical, hemodynamic, and angiographic characteristics associated with recurrent VF or sudden death (VF/SD) after an initial event.
- To determine if angiographic findings can predict high-risk individuals for recurrent VF.
Main Methods:
- Cardiac catheterization and angiography were performed on 64 patients resuscitated from out-of-hospital VF.
- Patients were followed for an average of 20.4 months to record recurrent VF/SD.
- Characteristics of patients with recurrent VF/SD were compared to those who survived without recurrence.
Main Results:
- 94% of patients had severe coronary atherosclerosis (≥70% stenosis).
- Recurrent VF/SD occurred in 14 of 64 patients.
- Recurrent VF/SD was associated with triple vessel CAD (P<0.01), lower ejection fractions (P<0.05), and severe left ventricular contraction abnormalities (P<0.001).
Conclusions:
- Angiographic findings are valuable in identifying patients at high risk for recurrent VF/SD after resuscitation.
- Myocardial scarring may play a critical role in the initiation and recurrence of ventricular fibrillation.
Abstract:
Sixty-four patients with coronary artery disease (CAD) who had been resuscitated from out-of-hospital ventricular fibrillation (VF) underwent cardiac catheterization and angiography. The majority (72%) had a previous history of cardiovascular disease; in the remaining 28%, VF was the first manifestation of CAD. Advanced coronary atherosclerosis was a common finding; 94% of the patients had severe stenoses (70% or greater diameter narrowing) in one or more of the major coronary arteries, and most (70%) had ventricular wall contraction abnormalities. In over half of the patients, coronary anatomy was potentially suitable for complete revascularization. During an average follow-up period of 20.4 months, fourteen of the 64 patients developed a second episode of VF and/or died suddenly (VF/SD). In an attempt to identify characteristics which might be of prognostic value, the clinical, hemodynamic, and angiographic characteristics of this group were compared to those patients who had a single episode of VF and survived during follow-up. Patients who developed recurrent VF/SD had more triple vessel CAD (P less than 0.01), lower ejection fractions (P less than 0.05), and far more severe abnormalities of left ventricular contraction (P less than 0.001). These results indicate that angiographic findings can identify individuals at high risk for recurrent VF and also suggest that myocardial scarring may be an important factor in the initiation of ventricular fibrillation and in its recurrence.