amca ekg cert practice Questions with Detailed
Verified Answers for Accuracy
the use of non-invasive and painless ultrasound to examine the
heart, its chambers and valves is known as:
✓✓ echocardiography
waveforms my be displayed on a screen called an
✓✓ electrocardiogram
the breastbone is referred to as
✓✓ the sternum
the pericardial sac that surrounds the heart ?
✓✓ has a tough fibrous outer layer called the visceral
pericardium and an inner, thin transparent lining called the
fibrous pericardium
what are the three layer ofo the heart wall
✓✓ epicardium myocardium endocardium
the atrioventricular valve between the left atrium and the left
ventricle is the
✓✓ mitral valve
the wall that separates the two superior chambers o the heart is
called
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✓✓ interatrial septum
the heart valves that separate the atria from the ventricles are
called the
✓✓ atrioventricular valves
the skeleton of the heart
✓✓ separated the atria from the ventricles
the heart receives most of its own blood supply via the
✓✓ coronary arteries
regulation of the heart rate, speed of electrical conduction and
strength of contraction are influenced by the brain via the ____
nervous system
✓✓ central
the cardio accelerator center
✓✓ is part of the sympathetic nervous system
the most muscular chamber of the heart that forces blood
through the aortic valve
✓✓ left ventricle
during depolarization
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✓✓ impulses are generated and transmitted when positively
charged ions move inside the cell causing the interior to become
positively charged
blood returns to the heart from the lungs via four blood vessels
called
✓✓ pulmonary veins
blood travels to the lungs where carbon dioxide is unloaded
and oxygen is loaded. the blood vessels that carry the blood
from the heart to the lungs are
✓✓ pulmonary arteries
during which phase of the cardiac cycle do the coronary
arteries fill
✓✓ early systole
hoe much of the blood coming into the ventricles flow passively
through the atria
✓✓ 80%
with ecg paper
✓✓ five small squares which make up a larger box represent
.20 second duration
what is placed on the patients skin o detect the heart's
electrical activity