A 45-year-old man with no prior cardiac history reports intermittent palpitations and sensation of skipped beats, particularly after inadequate sleep. Vital signs: BP 128/82 mmHg, HR 76 bpm, RR 14/min, temp 37°C, SpO2 98% on room air. Physical examination reveals regular rate and rhythm with no murmurs. ECG demonstrates occasional wide QRS complexes (>120 ms) without preceding P waves, followed by full compensatory pauses. Troponin is normal. Which diagnosis best explains these findings?
- A)Premature ventricular contractionsGABARITO
- B)Accelerated idioventricular rhythm
- C)First-degree AV block
- D)Premature atrial contractions
- E)Atrial fibrillation
Explicação
Premature ventricular contractions arise from ectopic ventricular foci, producing an early wide QRS complex without a preceding P wave and a full compensatory pause. They are common and can occur in healthy individuals, although frequent PVCs warrant evaluatio... Ver explicação completa e trilha adaptativa →