The ECG recordings of the groups were compared based on the frequencies of the right bundle branch block, left bundle branch block, left anterior hemi block (LAH), left posterior hemi block (LPH), first-degree atrioventricular (AV) block, unifascicular block, bifascicular
block, trifascicular block, and fragmented QRS.
Exclusion criteria were defined as one or more of the following: II or III degree atrioventricular block, bifascicular
block or trifascicular block, persist or permanent AF, rheumatoid valvular heart disease, or a history of ventricular tachycardia.
Hypertension, presence of palpitations, right bundle branch blocks, bifascicular
blocks, and a "severely abnormal" EKG were identified as risk factors for sudden cardiac death (SCD) in DM patients .
Both heads converge in short, wide, flattened, and bifascicular
tendon inserting in the humerus, lateral to the bicipital groove.
Electrocardiographic features of arrhythmic syncope * Non-sustained VT * Bifascicular
block (LBBB or RBBB combined with left anterior or left posterior fascicular block) or other intraventricular conduction delay with QRS >120 ms * Sinus bradycardia (<50 bpm or sinoatrial block in absence of negative chronotropic medications or physical training) * Pre-excited QRS complex * Prolonged or shortened QT interval * RBBB pattern with ST elevation in V1--V3 (Brugada pattern) * Negative T waves in the right praecordial leads, epsilon waves, and ventricular late potentials suggestive of ARVC ARVC = arrhythmogenic right ventricular cardiomyopathy; LBBB = left bundle branch block; RBBB = right bundle branch block; VT = ventricular tachycardia.
Two decades later, Carr and coworkers reported a transient bifascicular
block after blunt injury .
Tenia historia de cardiopatia dilatada biventricular idiopatica, con fraccion de eyeccion del ventriculo izquierdo (FEVI) del 10%, falla cardiaca en estadio D, de clase funcional IV, hipertension pulmonar con presion sistolica de arteria pulmonar (PSAP) de 65 mm Hg (ecocardiograma) y de 41 mm Hg (cateter de la arteria pulmonar), y bloqueo bifascicular
. Sus antecedentes eran sincope recurrente, diabetes mellitus y miastenia grave.
abnormalities typical of Chagas disease such as bifascicular
blocks and conduction alterations (Arribada et al.
An electrocardiogram (EKG) revealed a bifascicular
heart block, which was not new based on older EKGs.
Each case report was analyzed for the documented presence of non-modifiable risk factors for drug-induced TdP, i.e., female sex (6) and structural heart disease, including high-degree atrial-ventricular block (i.e., complete atrialventricular block, second degree Mobitz II atria l-ventricular block), bifascicular
block, congestive heart failure, ischemic heart disease, left ventricular hypertrophy, and valvulopathy (1, 2).
Features that deduct points from the total include the presence of cyanosis or diabetes, which each deduct 4 points, and bifascicular
block, which cuts 3 points.
The incidence of progression of chronic bifascicular
block (RBBB + LAFB or RBBB + LPFB) to complete atrioventricular block is low, and in the absence of symptoms prophylactic permanent pacemaker implantation is not warranted.