Heart Health

What is Electrophysiology and Its Relation to Heart Health? | by Nora Eccles Harrison CVRTI | Nov, 2021

Nora Eccles Harrison CVRTI

We all know the feeling of our heart racing or fluttering as we get excited, nervous, or stressed. But what is going on in the heart to get a heart rhythm? The heart contracts and expands to pump blood through the body using an electrical stimulus that starts in the heart’s sinoatrial node. That electrical stimulus travels through the four chambers of the heart to give the heart the ability to pump blood. Electrophysiology is the study of the electrical patterns in the heart. Electrophysiologists are doctors who specialize in the heart’s electrical patterns and most commonly treat patients with heart arrhythmias.

When the electrical stimulus in the heart does not follow the correct electrical pathway through the heart, the heart contracts and expands either too rapidly or slowly, causing blood to flow improperly or back into the heart. The disruption in the electrical stimulus’s pathway is the cause of the arrhythmia. What can happen over time with repeated arrhythmias is that the heart cannot pump as effectively, resulting in less blood flow throughout the body. Electrophysiologists are concerned with arrhythmias when they happen unexpectedly and frequently. Not all arrhythmias are a concern, and some can be considered harmless. The earlier the diagnosis of arrhythmia, the better the outcomes for the patient. Arrhythmias can damage or weaken the heart and the heart’s ability to pump blood. Treatment options for arrhythmias can help control the occurrence of the arrhythmia or prevent damage to the heart.

Specifically, electrophysiologists are concerned with patients who experience atrial fibrillation. Atrial fibrillation (also known as AFib) is an arrhythmia where the chambers of the heart begin to rapidly beat and look like they are quivering. Blood can get unexpectedly pushed into the atria of the heart. The trapped blood can lead to blood clots or strokes. Atrial fibrillation is a severe worldwide disorder and is expected to affect around 40 million people. Early diagnosis of is vital to ensure successful outcomes.

CVRTI researchers are also learning the ion channels that generate electrical signals in the heart have other roles as well. Ion channels can regulate mitochondria, which is the power center of each muscle cell, as well as cell organization. Also, the proteins that organize ion channels can be used to rescue failing heart muscle as well as help clinicians quantify the extent of heart muscle failure . The more we learn about ion channel, the better our understanding that these basic building blocks are not just important for the heart’s electrical system, but for heart function as well.

Originally published at https://cvrti.utah.edu/what-is-heart-failure-and-how-can-it-be-treated/ on October 29, 2021

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