…bundle branch block (C). One large box equals 100 ms at paperspeed 25 mm/s. Figure 2 shows 12 lead ECGs demonstrating right and left…

Conduction defects ECG Intraventricular conduction delay (defect): constellations of bundle branch blocks and fascicular blocks (hemiblocks) This chapter discusses intraventricular conduction delays (defects), which are…

…and the fascicles extend into the fine Purkinje network, which spreads throughout the myocardium. Figure 2 illustrates a normal ECG, a left bundle branch block…

…His bundle, which bifurcates into the left and right bundle branches. The left bundle branch further subdivides into two fascicles. From these branches and fascicles…

…atrial impulse reaches the atrioventricular node (or bundle of His) while it is completely refractory, the impulse will be blocked and no QRS complex appears…

…left bundle branch block (LBBB) or pacemaker rhythms. Atrial fibrillation or atrial flutter Patients on medications such as nitrates, beta blockers, or calcium channel blockers…

…abnormal ventricular depolarization (e.g sinus tachycardia with simultaneous left bundle branch block). P wave and PR interval Checklist P wave is always positive in…

…sinus tachycardia with simultaneous left bundle branch block). 2. P wave morphology and PR interval Assess P wave morphology and PR interval P wave is…

…excitable pathway whereas it will be blocked in the refractory pathway. If the refractory pathway has repolarized before the impulse has left the atrioventricular node…

… OM2, 14), the left posterior descending artery (LPDA, 15), and the left posterolateral branch (LPLB, 18). (B) Corresponding CT schematic with coronary artery origins from…