Electrocardiographic antecedents of primary ventricular fibrillation. Value of the R-on-T phenomenon in myocardial infarction.
Key result
Warning ventricular arrhythmias and the R-on-T phenomenon are poor predictors of primary ventricular fibrillation in acute myocardial infarction, occurring at similar rates in patients with and without VF (58% vs 55% and 50% vs 49%, respectively).
Why the study?
Do warning ventricular arrhythmias and the R-on-T phenomenon predict primary ventricular fibrillation in patients with acute myocardial infarction?
Population
450 consecutive patients admitted within 24 hours after the onset of acute myocardial infarction
Comparison
Electrocardiographic monitoring for warning… vs Patients without primary ventricular fibrillation
Design
Cohort
Authors
Discussion
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Implication
Warning arrhythmias should not guide VF prophylaxis in AMI; challenges their predictive utility and leaves open identification of reliable precursors.
Study Design
Type
Observational (n=450)
Structured PICO
Do warning ventricular arrhythmias and the R-on-T phenomenon predict primary ventricular fibrillation in patients with acute myocardial infarction?
P
Population
450 consecutive patients admitted within 24 hours after the onset of acute myocardial infarction.
E
Exposure
Electrocardiographic monitoring for warning ventricular arrhythmias and the R-on-T phenomenon
C
Comparator
Patients without primary ventricular fibrillation
O
Outcome
Incidence of primary ventricular fibrillationhard clinical
Cite This Study
El-Sherif et al. (1976) conducted an observational in Acute myocardial infarction (n=450). Warning ventricular arrhythmias and R-on-T phenomenon vs. Absence of warning arrhythmias or R-on-T phenomenon was evaluated on Primary ventricular fibrillation. Warning ventricular arrhythmias and the R-on-T phenomenon are poor predictors of primary ventricular fibrillation in acute myocardial infarction, occurring at similar rates in patients with and without VF (58% vs 55% and 50% vs 49%, respectively).