Heart and ECG Activity

Front

What is the Apex of the heart?

Back

The Apex is the pointed end of the heart, located at the bottom of the left ventricle, and is responsible for the heart's contraction.

Front

What does the P wave represent in an ECG?

Back

The P wave represents atrial depolarization, which is the electrical activity that triggers the contraction of the atria.

Front

What does the T wave indicate in an ECG?

Back

The T wave indicates the repolarization of the ventricles, which is the process of the heart muscle cells returning to their resting state after contraction.

Front

What is the function of the SA node?

Back

The SA node, or sinoatrial node, is the natural pacemaker of the heart that initiates the electrical impulses for heartbeats.

Front

What is the role of the AV node?

Back

The AV node, or atrioventricular node, acts as a gatekeeper that slows down the electrical signal before it passes to the ventricles, allowing for proper timing of contractions.

Front

What are Purkinje Fibers?

Back

Purkinje Fibers are specialized conductive fibers located in the ventricular walls that distribute the electrical impulse, causing the ventricles to contract.

Front

What is depolarization in the context of heart activity?

Back

Depolarization is the process by which heart muscle cells become electrically activated, leading to contraction.

Front

What is repolarization in the context of heart activity?

Back

Repolarization is the process by which heart muscle cells return to their resting state after contraction, preparing for the next heartbeat.

Front

What is the significance of the QRS complex in an ECG?

Back

The QRS complex represents ventricular depolarization, which is the electrical activity that triggers the contraction of the ventricles.

Front

How does the heart's conduction system work?

Back

The heart's conduction system consists of specialized cells that generate and conduct electrical impulses, coordinating the heart's contractions.