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- W2060203103 abstract "To assess the effects of pacing-induced left bundle branch block on left ventricular (LV) systolic and diastolic performance, we performed digital subtraction ventriculography while simultaneously measuring LV pressure with a catheter tip micromanometer. The subjects included 10 patients with a sinus rhythm, a normal QRS duration and PR interval within 0.22 sec. LV performance was assessed during both right atrial pacing (AP) and atrioventricular sequential pacing (AVP) at the same pacing rate. The atrioventricular pacing interval during AVP was adjusted to be the maximal interval that showed the QRS configuration seen during complete right ventricular pacing. LV end-diastolic pressure and volume during AVP did not differ from those during AP. Peak positive and negative dp/dt during AVP were significantly lower than those during AP. Time constants were also significantly longer during AVP. The QRS duration during AVP significantly correlated with end-systolic volume and time constants, and inversely correlated with ejection fraction and +dp/dt. These observations indicated that conduction disturbance per se, induced by AVP, could not only impair LV systolic performance but also diastolic performance, possibly due to asynchronous contraction and relaxation of the left ventricle." @default.
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- W2060203103 date "1990-01-01" @default.
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- W2060203103 title "The effects of pacing-induced left bundle branch block on left ventricular systolic and diastolic performances." @default.
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- W2060203103 doi "https://doi.org/10.1536/ihj.31.309" @default.
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