Cardiac Anatomy & Physiology
This is the outermost layer of the heart.
What is the epicardium?
This is the blood vessel that carries oxygenated blood from the lungs to the heart.
What is the pulmonary vein?
This is the pacemaker of the heart.
What is the sinoatrial (SA) node?
The wave on an EKG that represents atrial depolarization.
What is the P wave?
One small square on the EKG paper represents this amount of time.
What is 0.04 seconds?
These are the chambers of the heart responsible for receiving blood.
What are the atria?
Supplies the heart muscle with blood.
What are the coronary arteries?
This is the normal firing rate of the SA node.
What is 60-100 times per minute?
This is the electrical signal that stimulates ventricular contraction.
What is the QRS complex?
The number of small squares in one large square on the EKG paper.
What is 5?
This valve separates the left atrium from the left ventricle.
What is the bicuspid/mitral valve?
This is the blood vessel that carries deoxygenated blood from the heart to the lungs.
What is the pulmonary artery?
This is the part of the conduction system that delays the electrical signal to allow for atrial contraction.
What is the atrioventricular (AV) node?
The segment that represents the time it takes for electrical impulses to travel from the atria to the ventricles.
What is the PR interval?
This is represented by the vertical axis on the EKG paper.
What is voltage/amplitude?
This is the largest artery in the body.
What is the aorta?
This is the valve that separates the right atrium from the right ventricle.
What is the tricuspid valve?
This is the normal firing rate of the AV junction.
What is 40-60 times per minute.
This is the wave representing ventricular repolarization.
What is the T wave?
The charge on the outside of the cell membrane in its resting/polarized state.
What is positive charge?
This is the relaxation phase of the cardiac cycle.
What is diastole?
The structure that prevents backflow of blood from the aorta into the left ventricle.
What is the aortic semilunar valve?
This is the bundle of fibers that conducts the electrical signal to the ventricles.
What is the bundle of His?
You would see this on an EKG if there was a cardiac conduction problem.
What is a prolonged PR interval?
This electrical event precedes cardiac muscle contraction.
What is depolarization?