However, presence of T-wave negativity and bundle branch
block were associated with mortality.
It is seen as a particular pattern on an electrocardiogram or ECG, which tells the doctor whether the affected part of the conducting tissue is causing left or right bundle branch
Electrocardiographic diagnosis of evolving acute myocardial infarction in the presence of left bundle branch
Incomplete right bundle branch
block is a common normal variant found on electrocardiogram and is also another finding that is often associated with an athletic heart and is of no consequence.
Because the normal circular flow of electricity in these patient's hearts was interrupted by a slowing of conduction in the left bundle branch
, consisting of specialized conducting tissue, they reasoned that the right bundle branch
would be critical to maintaining the tachycardia, and they destroyed it.
The pacemaker lead is in the right ventricle, and consequently pacer-initiated QRS complexes (the first QRS in the limb leads and the third and fourth QRSs in the precordial leads) resemble left bundle branch
A twelve-lead electrocardiogram demonstrated a wide QRS tachycardia with a right bundle branch
block pattern and superior axis (Fig.
Major ECG abnormalities were defined as Q-QS wave abnormalities, left ventricular hypertrophy, Wolff-Parkinson-White syndrome, complete bundle branch
block or intraventricular block, atrial fibrillation, atrial flutter, or major ST-T changes.
The Heartscape 3D ECG System, successor to the PRIME ECG technology, uses the same clinically supported diagnostic algorithm to help physicians identify indications of possible Myocardial Infarction (MI) - including MIs without ST-segment elevation on traditional 12-lead ECGs, and in patients with Left Bundle Branch
If approved, Boston Scientific would become the only company with an FDA-approved CRT-D for high-risk New York Heart Association (NYHA) Class I and II  patients with Left Bundle Branch
Block (LBBB) morphology and sinus rhythm.
When the impulse slows or blocks in the right ventricle, it is called right bundle branch
block, and in the left ventricle, left bundle branch
Another role that MSCT may have in the preoperative period is the detection of CAD in patients with left bundle branch