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- Asystole at the time of resuscitation from cardiac arrest carries the poorest prognosis
- Patients with normal myocardial perfusion in the presence of angiographically documented coronary artery disease have very low rates of cardiac events (<1% per year)
- Soft, systolic ejection murmur augments with rising from a squatting position HCM. Risk factors for sudden death include: sudden death in a first-degree relative, maximal septal thickness >30 mm, unexplained syncope, low blood pressure during treadmill stress testing, and nonsustained ventricular tachycardia (NSVT) on Holter
- Narrow QRS tachycardia, BP normal, active COPD - Verapamil IV bolus
- Fall in systolic blood pressure during exercise is associated with severe coronary artery disease
- Asymptomatic secundum ASD develops exertional dyspnea in third trimester of pregnancy is due to impaired diaphragmatic excursion from increasing size of uterus (non cardiac cause)
- PPM, ventricular-paced complex RBBB morphology. Ventricular lead may be in LV - obtain AP and lateral CXR to evaluate lead position
- RACE-II Study target resting heart rate <80 bpm vs <110 bpm in patients with permanent atrial fibrillation had similar rates of major adverse events. No change in therapy
- Amitriptyline overdose, recurrent wide complex tachycardia - IV hypertonic sodium bicarbonate
- VF is most commonly documented rhythm disturbance for an adult with out-of-hospital sudden cardiac death resuscitated within the first 4 minutes after arrest