t has been known for some time that an altered sequence of entricular activation with a left bundle-branch conduction isturbance or right ventricular pacing is associated with a eduction in systolic and diastolic function manifested by ower ejection fraction and higher filling pressures. Furtherore, a variety of studies have shown that for a period of ime following cessation of the conduction d...

The goal of this paper is to apply the universal gerbe of [CMi1] and [CMi2] to give an alternative, simple and more unified view of the relationship between index theory and gerbes. We discuss determinant bundle gerbes [CMMi1] and the index gerbe of [L] for the case of families of Dirac operators on odd dimensional closed manifolds. The method also works for a family of Dirac operators on odd d...

We describe a 73-year-old woman with a history of breast cancer and metastatic disease diagnosed in January 2002 (stable when we saw her) who was admitted for sudden dyspnea and presyncope. Complete atrioventricular block was documented, and a temporary pacemaker was implanted. Eight hours after admission she recovered sinus rhythm with left bundle branch block as seen in previous recordings. C...

Cardiac pacing through a transvenous catheter located in the right ventricle usually produces a pattern of left bundle branch block (LBBB). When right bundle branch block (RBBB) occurs during apparent right ventricular pacing, a complication (perforation or malposition of the catheter) has usually occurred. In the patient reported here, uncomplicated right ventricular transvenous pacing produce...

We present the case of a 72-year-old male who underwent a permanent transvenous DDD pacemaker implantation for symptomatic complete heart block. The postoperative surface electrocardiogram (ECG) revealed a right bundle branch block (RBBB) pacing pattern with transition in lead V3 and left bundle branch block (LBBB) in D1, suggesting a malpositioned ventricular lead in the left heart. Malpositio...

The purpose of this study was to examine factors associated with the development of complete left bundle-branch block and the prognosis in a group of people not in hospital, who had no clinical evidence of ischaemic or valvular heart disease. Twenty-nine cases of left bundle-branch block without clinical evidence of ischaemic heart disease were noted in the Manitoba cohort of 3983 men under obs...

Rate dependent left bundle branch block (LBBB) occasionally occurs during anaesthesia when the heart rate exceeds a critical value. Transient LBBB has been associated with increased heart rate under general and local anesthesia and without obvious aetiologic factors during anaesthesia [1]. It is usually a benign disorder but it may mask the ECG manifestations of ischemia. This case report descr...

OBJECTIVE To examine use of thrombolytic drugs for myocardial infarction and use of contraindications to treatment in the United Kingdom. DESIGN Observational study, based on a continuing audit. SETTING 39 hospitals in the United Kingdom. PATIENTS 30,029 patients admitted between November 1992 and June 1995 with suspected myocardial infarction. RESULTS Of 13,628 patients with a final di...

The effects of alternating cycle lengths (bigeminal rhythm) on His-Purkinje system refractoriness were studied in 14 patients using His bundle and right bundle recordings. Programmed atrial stimulation at constant cycle length (method I) was scanned using the atrial extrastimulus technique (A2) and compared with an atrial cycle length of identical duration coupled to A2 on alternate beats (meth...

Electrocardiograms from 109 patients with left bundle branch block were divided into four major groups depending on differences in standard and unipolar precordial leads. These records were then studied to find if one can draw any conclusions relative to ventricular hypertrophy or myocardial infarction in the presence of left branch block. In addition, the ventricular gradient was estimated in ...