How the Heart Contracts: Understanding the Electrical Activity and Heart Arrhythmias

The video tutorial explores the heart's ability to contract independently, driven by pacemaker cells and the sinoatrial (SA) node. It details the heart's conductive pathway, including the atrioventricular (AV) node and the bundle of His, leading to the Purkinje fibers. The tutorial explains the electrocardiogram (ECG) and its role in assessing heart electrical activity. It concludes with a discussion on heart arrhythmias, such as tachycardia and bradycardia, and their potential health implications.

What are heart arrhythmias and what complexities do they encompass?

What is tachycardia and under what conditions can it occur?

How does bradycardia differ from tachycardia?