ventricular tachycardia Bizarre, wide QRS, no Pwav, rate > 100
Ventricular fibrillation Chaotic waves
tachycardia, sinus rhythmNormal P, QRS, T, rate > 100
premature ventricular contraction Wide QRS, unrelated to Pwave
premature atrial contraction Premature Pwave, irregular P-P interval
normal sinus rhythm Normal deflections & intervals
bradycardia, sinus rhythmNormal P, QRS, T, rate < 60
first degree heart block Long PR interval
Two Pwaves per QRS complex
ventricular fibrillation