Suboptimal biventricular pacing. What is the mechanism?
نویسندگان
چکیده
منابع مشابه
Paradoxical Response During Para-hisian Pacing: What is the Mechanism?
A 64 year old lady underwent electrophysiologic study for recurrent episodes of palpitation and documented narrow complex tachycardia. 12 lead ECG showed normal sinus rhythm and no evidence of preexcitation. At baseline, the cycle length, AH and HV intervals were 776, 52 and 46 ms respectively. Para-Hisian pacing was done at baseline and the response is shown in figure 1. The pacing output duri...
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An electrophysiologic procedure was performed in a 50-year-old man with a 20-year history of paroxysmal tachycardia. During sinus rhythm, the atrial-His (AH) interval was 70 msec, the His-ventricular (HV) interval was 45 msec, and the QRS width was 80 msec. During atrial pacing at a cycle length of 290 msec, there was widening of the QRS complex (Fig. 1). The transition from a narrow to wide QR...
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ژورنال
عنوان ژورنال: Journal of Arrhythmia
سال: 2019
ISSN: 1880-4276,1883-2148
DOI: 10.1002/joa3.12207