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- Persistence of ST depression for 60 to 80 milliseconds after J point is necessary to interpret ECG response as abnormal
- Phasic declines in venous pressure (x and y descents) are typically more prominent to eye than positive pressure waves (a, c, and v waves) because they produce larger excursions
- Chronic AFib, slow ventricular rate and pauses more than 3 seconds that correlate with symptoms, normal LV function and no evidence of CAD - Single-chamber system in ventricle programmed to VVIR
- iCMP+permanent A fib.+CRTD 25%pacing+HF - benefit of CRT is highest with maximal biventricular pacing, AF with rapid ventricular response prevents maximal biventricular pacing. Restoration of sinus rhythm is unlikely to be successful in a patient with permanent AF. Next step AV nodal ablation
- After acute MI on nuclear imaging increased lung uptake of radioisotope at rest correlates with unfavorable prognosis
- Decline in beta-adrenergic responsiveness contributes to a fall in the maximum heart rate response to aerobic exercise in healthy older adults
- Regular narrow complex tachycardia, r' in lead V1 that is not present during sinus rhythm - AVNRT
- Murmur of aortic stenosis, but not mitral regurgitation, becomes louder after PVC
- β-Blockers are most consistently shown to be effective for primary prevention of sudden cardiac death in patients with CAD and recent MI
- Kussmaul sign occurs in states of reduced RV compliance and volume overload like acute pulmonary embolism. McConnell sign has sparing of RV apex