A 72-year-old woman with long-standing hypertension presents with palpitations and dyspnea. Vital signs show BP 148/92 mmHg, HR 118/min, RR 22/min, temperature 36.8°C, and SpO2 98% on room air. ECG demonstrates QRS duration of 160 milliseconds with broad monophasic R waves in leads I and V6, and deep broad S waves in V1. Chest X-ray shows no acute pulmonary pathology. She denies recent chest pain. Which of the following is the most likely diagnosis?
- A)Atrial fibrillation
- B)Mobitz I block
- C)Left bundle branch blockGABARITO
- D)Wolff-Parkinson-White syndrome
- E)Right bundle branch block
Explicação
Broad monophasic lateral R waves with deep broad S waves in V1 and marked QRS prolongation are characteristic of left bundle branch block. LBBB reflects delayed left ventricular activation and often suggests underlying structural heart disease. Ver explicação completa e trilha adaptativa →