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 ...

OBJECTIVE The aim of this study was to examine the usefulness of a portable Internet-enabled ECG recording system (iECG) in monitoring the heart health of Japanese individuals working abroad. METHODS This study included 24 male Japanese individuals working abroad, who had been found to have risks of cardiovascular diseases (CVDs) at periodic health checkups. The subjects were instructed to se...

The cases of two Asian brothers with idiopathic left ventricular tachycardia are reported. Their 12-electrocardial leads showed regular, wide QRS tachycardia showing left bundle branch block morphology with a superior axis deviation. Radiofrequency ablation was performed and there was no specific events during 10 year follow up.

or even complete A-V block. Two cases are reported in which catheter-induced transient high grade Mobitz II A-V block, acute reversible prolongation of infranodal conduction time with probable intra-Hisian conduction delay, and persistent (6 hours duration) complete A-V block occurred in patients with left bundle branch block. The observations made indicate that A-V conduction times and the app...

A 77-year-old female patient with sinus bradycardia and left bundle branch block was implanted with a DDD Biotronik Kairos DR pacemaker in 1999, then a replacement for depleted battery was performed in 2007 (Biotronik Axios DR). During our regularly scheduled follow-ups, we found the atrial and ventricular sensing/pacing function to be satisfactory: P: 3.6 mV, R: 9.9 mV, atrial threshold: 0.7 V...

The electrocardiographic features associated with acute myocardial infarction (AMI) are often easily recognised. However, interpretation is made more difficult in the presence of confounding patterns such as a left bundle branch block (LBBB). This may result in missed cases which may otherwise have benefited from acute revascularisation therapy. Though not straightforward, the diagnosis of AMI ...

The left bundle-branch potential (LB), as well as His bundle (H) and atrioventricular nodal (N) potentials, were recorded in intact dogs by using a tripolar electrode catheter positioned in the left ventricle. Simultaneous recordings of H and right bundlebranch (RB) activity from the right endocardial surface were also made. The LB potential was less rapid than the RB potential, but both occurr...

Vectorcardiograms of paced and unpaced beats were recorded from 18 patients with implanted pacemakers to investigate the characteristics of post-pacing T inversions. The intraventricular conduction during sinus rhythm of unpaced beats was normal in 13 of 18 patients and abnormal in the other 5 (RBBB in 3, LBBB in 2). The directions of the maximum QRS vector in paced beats (max QRSp.V) and maxim...