A couplet of PVCs with different QRS morphologies arising from a single origin in the left ventricular outflow tract.
A 59-year-old man with two different premature ventricular contractions (PVCs) forming a couplet underwent electrophysiological testing. Although pacing from the aorto-mitral continuity (AMC) produced an excellent pace map of one type of PVCs, a radiofrequency application within the right coronary cusp (RCC) eliminated all the PVCs. This case demonstrates that a single origin with two breakout sites in the left ventricular ostium (LVos) may result in a couplet consisting of different PVCs and preferential conduction from the RCC to AMC may also occur. These possibilities should be kept in our mind when predicting sites of origin of LVos ventricular arrhythmias.
Yamada
Takumi
T
University of Alabama, Birmingham, AL, USA. takumi-y@fb4.so-net.ne.jp
McElderry
H Thomas
HT
Doppalapudi
Harish
H
Kay
G Neal
GN
D017115:Catheter Ablation; D006333:Heart Failure / Q000209:etiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D012804:Sick Sinus Syndrome / Q000150:complications*; D018879:Ventricular Premature Complexes / Q000175:diagnosis* / Q000209:etiology* / Q000601:surgery