Podcasts

Ventricular Arrhythmias Wide QRS complex No preceding P wave Premature Ventricular Contractions (PVC) Extra beat originating in one of the ventricles No p wave Wide QRS Terminology Bigeminy – PVC is every other beat. One normal beat followed by a PVC repeated … [Read more...] about S2 E023 Ventricular Rhythms

Atrial fibrillation Fibrillation Muscular twitching involving individual muscle fibers acting WITHOUT coordination The most common chronic arrhythmia Onset is PSVT before becoming chronic First event will spontaneously convert 60% of the time within the first 24 hrs Risk … [Read more...] about S2 E022 Afib & Aflutter

The conduction system of the heart Sinoatrial node SA node, sinus node The “pacemaker” Located in the right atrium Specialized cells that generate the electrical impulse which travels through the heart causing it to beat. The normal rate at which the SA node will fire is … [Read more...] about S2 E021 Introduction to Conduction Disorders

Myocardial Infarction (MI) An ischemic event affecting cardiac tissue Cardiac muscle is dying due to insufficient supply of oxygen Causes Most commonly a thrombotic event which occurs at the site of preexisting plaque causing a complete blockage of an artery. Vasospasm … [Read more...] about S2 E20 Myocardial Infarction

Ischemia An insufficient supply of oxygen that leads to tissue damage or death Causes Atherosclerosis Constriction of arteries Emboli Bleeding ( low blood volume) Risk Factors Stress Atypical increase in activity Male Increasing age Smoking … [Read more...] about S2 E019 Ischemia