tachycardia is defined asdefine tachycardia and bradycardiadefine ventricular tachycardiadefine atrial tachycardiadefine reflex tachycardiadefine sinus tachycardiadefinition of tachycardiadefine tachyarrhythmiadefine supraventriculardefine psvtdefine ventricular arrhythmiastachycardia and bradycardia
