Author's response to reviews Title: Exercise-Induced Left Bundle Branch Block and Subsequent Mechanical Left Ventricular Dyssynchrony -Resolved with Pharmacological Therapy- Authors:
نویسندگان
چکیده
Hidekazu Tanaka ([email protected]) Mana Hiraishi ([email protected]) Tatsuya Miyoshi ([email protected]) Takayuki Tsuji ([email protected]) Akihiro Kaneko ([email protected]) Keiko Ryo ([email protected]) Kohei Yamawaki ([email protected]) Yuko Fukuda ([email protected]) Kazuko Norisada ([email protected]) Kazuhiro Tatsumi ([email protected]) Kensuke Matsumoto ([email protected]) Hiroya Kawai ([email protected]) Ken-ichi Hirata ([email protected])
منابع مشابه
Exercise-induced left bundle branch block and subsequent mechanical left ventricular dyssynchrony -resolved with pharmacological therapy
A 53-year-old man with depressed ejection fraction (EF) of 35% and QRS width of 88 ms at rest was admitted to our institution with a complaint of exertional chest discomfort and dyspnea. During treadmill exercise, left bundle-branch block (LBBB) with a QRS width of 152 ms occurred at a heart rate of 100 bpm. During LBBB, the patient showed significant mechanical dyssynchrony as evidenced by a t...
متن کاملDiminished left ventricular dyssynchrony and impact of resynchronization in failing hearts with right versus left bundle branch block.
OBJECTIVES We compared mechanical dyssynchrony and the impact of cardiac resynchronization therapy (CRT) in failing hearts with a pure right (RBBB) versus left bundle branch block (LBBB). BACKGROUND Cardiac resynchronization therapy is effective for treating failing hearts with conduction delay and discoordinate contraction. Most data pertain to LBBB delays. With RBBB, the lateral wall contra...
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BACKGROUND Left bundle-branch block (LBBB) and the presence of systolic dysfunction are the major indications for cardiac resynchronization therapy (CRT). Mechanical ventricular dyssynchrony on echocardiography can help identify patients responsive to CRT. Left bundle-branch block can have different morphologic patterns. OBJECTIVE To compare the prevalence of mechanical dyssynchrony in differ...
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AIMS Right ventricular pacing (RVP) prolongs ventricular activation and may induce mechanical dyssynchrony. We hypothesized that the severity of RVP-associated ventricular mechanical dyssynchrony may depend on the intrinsic intraventricular conduction pattern. METHODS AND RESULTS Sixty-five patients with a single- or dual-chamber RV pacemaker were included. Forty-seven patients with ejection ...
متن کاملDifferent effect of exercise on left ventricular diastolic time and interventricular dyssynchrony in heart failure patients with and without left bundle branch block
BACKGROUND In patients with idiopathic dilated cardiomyopathy (IDCM) a prolongation of left ventricular (LV) systole at the expense of diastolic time was demonstrated. Our study was aimed to evaluate the effect of exercise on heart rate corrected diastolic time in controls, IDCM with and without LBBB, and patients with LBBB and normal LV function. METHODS 47 patients with IDCM, 30 without LBB...
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