Cardiac Conduction and ECG

Front

What is the P Wave 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 QRS Complex represent in an ECG?

Back

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

Front

What is the T Wave in an ECG?

Back

The T Wave represents ventricular repolarization, which is the process of the ventricles recovering after contraction.

Front

What occurs during the T Wave in the heart?

Back

During the T Wave, the ventricles are repolarizing, preparing for the next heartbeat.

Front

Which part of the ECG corresponds to the repolarization of the ventricles?

Back

The T Wave corresponds to the repolarization of the ventricles.

Front

What is the function of the Atrioventricular bundle (Bundle of His)?

Back

The Atrioventricular bundle conducts electrical impulses from the AV node to the left and right bundle branches.

Front

What is the role of the Sinoatrial (SA) node?

Back

The SA node is the natural pacemaker of the heart, initiating the electrical impulses that trigger heartbeats.

Front

What is the function of the Atrioventricular (AV) node?

Back

The AV node receives impulses from the SA node and delays them before passing them to the ventricles, allowing for proper filling.

Front

What is the cardiac cycle?

Back

The cardiac cycle is the sequence of events in one heartbeat, including contraction (systole) and relaxation (diastole) of the heart chambers.

Tags

NGSS.HS-LS1-3

Front

What is depolarization in the context of cardiac conduction?

Back

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