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25 terms

EKG - Chapter 3

AV Node
special conductive tissue located in the lower right atrium
Pulmonary Artery
carries deoxygenated blood from the right side of the heart to the lungs
Bundle Branches
special conductive tissue that extends into the right and left ventricle
receives blood from the left side of the heart to be distributed to the rest of the body
SA Node
natural pacemaker of the heart
lower chambers or main pumping chambers
relating to the lungs
Bundle of His
conductive tissue leading from the AV node to the ventricular septum (between the right and left ventricle)
Vena Cava
large vein returning deoxygenated blood to the right side of the heart
the resting phase of the heart
Purkinje Fibers
conductive tissue that transmits electrical impulses from the bundle branches to the ventricle tissue
relating to the system of blood vessles
Pulmonary Vein
carries oxygenated blood from the lungs to the left side of the heart
the upper chambers
the time during which the heart is contracting or working
Cardiac Cycle
the series of electrical or mechanical events that comprise each heart beat
very small charged particles
the heart generates its own electrical impulse spontaneously
Heart Rhythm
the flow of blood through the heart structures and the synchronized and coordinated function of the heart during one heartbeat
one direction, backwards
The significance of the heart valves is that they ensure that blood will flow in ___ ______ and prevents blood from flowing _______ into the previous chamber or vessel.
protective sac
The ________ ___ is a protective covering around the heart.
rib cage
The ___ ____ is a bony structure that protects the heart, lungs, and large vessels.
left ventricle
The ____ ________ has a thick muscle and large chamber because it has to pump more blood farther than any of the other heart chambers.
Electrocardiogram Technician
_________ ________ must understand the anatomy and physiology of the heart in order to successfully perform their job.
pericardium, myocardium, endocardium
The ____ covers the heart. The heart muscle is the ____ and the lining of the heart is the ____.