Is the coupling interval fixed or variable? Are the PVCs multiform? Fixed coupling usually means the PVCs are caused by reentry. If unfixed and occur regularly, a parasystolic mechanism&an monomorphic irritable ventricular focus is likely. A PVC falling on the preceding T wave with a unidirectional block present can provoke ventricular tachycardia&V Fib. Consult a cardiologist electrophysiologist
Answered 7/28/2023
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