Electrophysiological findings in frequency-dependent left bundle-branch block.
نویسندگان
چکیده
منابع مشابه
Eectrophysiological observations in pateints with rate dependent bundle branch block.
Electrophysiological studies were conducted in 15 patients with tachycardic rate dependent bundle branch block (RDBBB): ten with left, and five with right. No bradycardic RDBBB was observed, despite occurrence of cycle lengths (CL) longer than 1200 msec in over half the patients studied. Onset of RDBBB was abrupt in 13 patients, and gradual in two. In three patients, the CL allowing reversion t...
متن کاملRole of electrophysiological study in patients with syncope and bundle branch block
BACKGROUND The finding of bundle branch block (BBB) in patients with syncope suggests that paroxysmal atrioventricular block (AVB) or ventricular tachyarrhythmia (VT) may be the cause of syncope. Guidelines for cardiac pacing and cardiac resynchronization therapy have been recommended to perform electrophysiological study (EPS) for confirming main cause of syncope. Therefore, the aim of our stu...
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Symptomatic bradycardia-independent atrioventricular block occurred in a patient with right bundle-branch block, left anterior hemiblock, and prolonged HV interval. The arrhythmia, triggered by a spontaneous or induced premature beats, appeared when the post-extrasystolic PP and HH intervals increased to a critical value. Reinitiation of atrioventricular conduction required the presence of vent...
متن کاملElectrophysiological studies in patients with rate-related intermittent left bundle-branch block.
Two patients who developed left bundle-branch block with increase in heart rate are presented. Atrial pacing during His bundle recording studies showed differing responses in the ventricular specialized conduction system of the two patients. In one, the onset of left bundle-branch block was associated with no change in the previously normal HVinterval (so msec), while in the second the HV inter...
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Left bundle branch block (LBBB) is an electrophysiological abnormality that can have profound acute and chronic hemodynamic effects. Intermittent LBBB has been noted to occur with accelerations in heart rate, typically during exercise (known as rate-dependent LBBB). This has been associated with acute deteriorations in cardiac systolic function through the development of left ventricular (LV) d...
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ورودعنوان ژورنال:
- British heart journal
دوره 36 9 شماره
صفحات -
تاریخ انتشار 1974