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Curated Video
How the Heart Contracts - Step by Step
Let's dive into the cardiac action potential and how it results in the contraction of the heart. We'll talk about the signal that starts at the SA node and spreads throughout the heart. We'll also get into the phases of depolarization,...
Catalyst University
The Pacemaker Potential EXPLAINED
In this video, we discuss how the electrical conduction system generates a pacemaker potential by viewing the action potential diagram.
Catalyst University
Parasympathetic Nervous System (Cranial Part) | Pathways & Components
In this video, we will discuss in detail the major components and pathways of the parasympathetic nervous system (cranial component).
Catalyst University
Choline Acetyltransferase: Physiology, Biochemistry, and Organic Mechanism
Choline Acetyltransferase: Physiology, Biochemistry, and Organic Mechanism
Institute of Human Anatomy
How the Heart Contracts: Understanding the Electrical Activity and Heart Arrhythmias
In this video, the teacher explains how the heart is able to contract dependably through its natural pacemaker, the SA node, and other specialized cells. The electrocardiogram (ECG) is also discussed as a highly effective method of...
Curated Video
How Adrenaline and Acetylcholine Affect Heart Rate
In this episode, I discuss the effect of Adrenaline and Acetylcholine on heart rate. Adrenaline speeds it up and Acetylcholine slows it down. They both have their effect by modifying the conductance for ions such as Sodium, Potassium and...
Catalyst University
The Cardiac Conduction System
In this video, we discuss the components of and functions of the electrical conduction system of the heart.
Catalyst University
EKG Patterns Supraventricular Tachycardia
In this playlist, we discuss clinically relevant EKG patterns. This video specifically covers supraventricular tachycardia (and its basic mechanism).
Sophia Learning
Sophia: Cardiac Conduction System Overview: Lesson 1
This lesson will explain and identify the components of the cardiac conduction system. It is 1 of 2 in the series titled "Cardiac Conduction System Overview."
Khan Academy
Khan Academy: Electrical System of the Heart
See where the pacemaker cells start the electrical wave of depolarization, and how it gets all the way to the ventricles of the heart. Rishi is a pediatric infectious disease physician and works at Khan Academy.
Khan Academy
Khan Academy: What Is Ventricle Fibrillation (Vfib)?
Ventricular fibrillation (also referred to as VF or v-fib) is a fatal cardiac rhythm that occurs when the lower chambers of the heart (ventricles) lose the ability to contract and circulate blood to the rest of the body. V-fib results in...