PBS - 2.1 EKG review Flashcard

Front

What are Purkinje fibers?

Back

Purkinje fibers are specialized conductive fibers located in the inner ventricular walls of the heart that help transmit electrical impulses, leading to ventricular contraction.

Front

What is the role of the SA node in the heart?

Back

The SA node, or sinoatrial node, is the natural pacemaker of the heart that initiates the electrical impulses, causing the heart to beat.

Front

What is the function of the AV node?

Back

The AV node, or atrioventricular node, receives impulses from the SA node and delays them before passing them to the ventricles, allowing for coordinated contraction.

Front

What is the correct sequence of electrical conduction in the heart?

Back

SA node → AV node → AV bundle → Bundle branches → Purkinje fibers.

Front

What condition is indicated by a heart rate that is too fast?

Back

Tachycardia is the condition characterized by an abnormally fast heart rate.

Front

What does the QRS complex represent in an EKG?

Back

The QRS complex represents ventricular contraction (depolarization) in an electrocardiogram (EKG).

Front

What is bradycardia?

Back

Bradycardia is a condition where the heart beats slower than normal, typically defined as a resting heart rate of less than 60 beats per minute.

Front

What is the significance of the Bundle of His?

Back

The Bundle of His is a collection of heart muscle cells that transmits electrical impulses from the AV node to the ventricles.

Front

What happens during ventricular repolarization?

Back

Ventricular repolarization is the process where the ventricles recover from contraction, represented by the T wave in an EKG.

Front

What are heart murmurs?

Back

Heart murmurs are abnormal sounds during the heartbeat cycle, often indicating turbulent blood flow due to valve issues.