Posted by: Johnson Francis on: 18 Feb, 2010
Ventricular premature complexes (VPCs) in couplet (Click on the image for an enlarged view) Ventricular premature complexes seen as wide bizarre QRS complexes not preceded by a P wave. Initial two VPCs are isolated while the last two occur in rapid sequence as a couplet. Couplets may be a forerunner of ventricular tachycardia. Isolated VPCs [...]
Posted by: Johnson Francis on: 26 Jan, 2010
Ventricular premature complexes (VPC) Click on the image for an enlarged view Ventricular premature complexes (VPC) are identified as premature wide QRS complexes, usually with no preceding P waves. Normal sinus P wave may precede a late diastolic VPC. Such a VPC may be mistaken for intermittent WPW (pre-excitation) syndrome. Coupling interval is the interval [...]
Posted by: Johnson Francis on: 15 Sep, 2009
Click on the image for a larger view Ventricular ectopic beats in couplets. Couplets indicate a higher potential for arrhythmia than isolated ventricular ectopic beats. If three ventricular ectopic beats occur in a sequence at a rate above 100 per minute is called a salvo or a short run of non sustained ventricular tachycardia. Upright [...]
Posted by: Johnson Francis on: 11 Sep, 2009
Ventricular arrhythmias are caused by ectopic ventricular foci. They have a wide QRS due slow conduction through the ventricle outside the specialised conduction system, with QRS width > 120 msec. P waves are either absent or dissociated from the QRS. The mechanisms of ventricular arrhythmias could be re-entrant circuits, automatic foci or triggered activity. Ventricular [...]
Posted by: Johnson Francis on: 07 Sep, 2009
Click on the image for a larger view Inferolateral myocardial infarction and ventricular ectopics: Inferior wall infarction is manifested as Q, ST elevation and T wave inversion in inferior leads (II, III and aVF). Lateral wall involvement is seen as ST segment depressio in I and aVL plus ST segment depression and T wave inversion [...]
