Fascicular block Blockage of the left posterior fascicle would lead to activation of the anterior portion of the left ventricle followed by activation of the rest of the ventricle in a superior to inferior direction and directed towards the<unk> . This would lead to<unk>  findings on an ECG. Bifascicular block is a combination of<unk>  bundle branch block and either left anterior fascicular block or left posterior fascicular block. Conduction to the ventricle would therefore be via the remaining fascicle. The ECG will show typical features of RBBB plus either left or<unk> . Lateral myocardial infarction The lateral wall of the left ventricle is supplied by branches of the left anterior descending (LAD) and left circumflex (LCx) arteries. Infarction of the lateral wall will thus lead to<unk>  of the<unk>  away from the site of infarction.<unk>  ventricular hypertrophy Increased thickness of the<unk>  ventricle leads to<unk>  Pre-excitation syndromes Pre-excitation refers to early activation of the ventricles due to impulses bypassing the AV node via an accessory pathway. Accessory pathways are abnormal conduction pathways formed during cardiac development. An example of pre-excitation syndromes is Wolff Parkinson White syndrome. Here, the presence of a left lateral accessory pathway leads to<unk> . Ventricular tachycardia Fascicular tachycardia usually arises from the posterior fascicle of the left bundle branch. They produce QRS complexes of relatively short durations with a<unk>  bundle branch block pattern. Tachycardias originating in the anterior left fascicle would lead to<unk> .<unk>  ventricular outflow tract tachycardia originates from the outflow tract of the<unk>  ventricle or the tricuspid annulus. As it arises from the<unk>  ventricle, the impulse spreads inferiorly from beneath the pulmonary valve, and there<unk> . Ventricular ectopy Ventricular ectopy is when the heartbeat is an abnormal heartbeat where the QRS complex is significantly wider. When the origin of the ectopic heartbeat is in the anterior fascicule then there is<unk> .
Right axis deviation
Pulsus alternans
Dichotic pitch
Heart click
Shifting dullness
Apex beat
Precordial thump
Third heart sound