An initial measurement of a condition that is taken at an early time point and used for comparison over time to look for changes.

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Regulates blood flow from the left atrium into the left ventricle

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A type of abnormal heart rhythm in which every other heartbeat is a premature contraction or extra heartbeat

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A condition where your heart beats more slowly than expected, under 60 beats per minute.

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A branch of nerve cells that extends from your AV node.

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When the heart stops beating suddenly.

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Repetitive mechanical and electrical events that produce the heartbeat and cardiac output.

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The heart squeezes to pump blood shortening of the muscles to produce cardiac output. Also known as systole

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Supply blood to the heart muscle. Arteries that branch from the aorta close to the left ventricle. Blockages in these arteries cause angina or myocardial infarction.

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Blood supply to the myocardium from arteries that originate from the aorta

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Flow of electricity is caused by positive ions movement into the cell membrane and negative ions out of the cell membrane. Should should correlate with contraction of the heart.

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the heart is positioned on the right side of the chest instead of on the left

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The phase of the heartbeat when the heart muscle relaxes and allows the chambers to fill with blood.

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Profuse perspiration or sweating; Can be caused by lack of blood flow to your heart muscle.

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Early, or extra heartbeats, which can cause palpitations that feel like your heart is skipping or missing a beat.

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A recording of the heart's electrical activity through repeated cardiac cycles.

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Plastic patches that are placed on the skin and are connected to an ECG machine by lead wires.

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Innermost layer of the heart

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The outermost layer of the heart. Also known as the visceral pericardium

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