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Definition
| The innermost layer of the heart. It lines the inside of the heart muscle and covers the heart valves. |
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Definition
The middle and thickest layer of the heart.
Responsible for the contraction of the heart. |
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Definition
| The outermost layer of the heart. Also known as the visceral pericardium. |
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| The right and left upper chambers of the heart. Receive blood from the superior and inferior vena cavae. |
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Definition
| The left and right lower chambers of the heart. |
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| Valves situated between the atria and ventricles. Right - tricuspid; Left - bicuspid (mitral) |
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| Valves situated between the ventricles and vessels taking blood away from the heart. Right - pulmonic; Left - aortic |
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| Specialized pacemaker cells in the hear that are arranged in a system of pathways. |
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Definition
| Supply blood and oxygen to the myocardium. The coronary sinuses empty into the right atrium. |
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Definition
| "slow cells" whose depolarization is dependent on calcium entry into the cells through slow channels. |
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Definition
| "fast cells" whose depolarization is depended on sodium entry into the cells through fast channels. |
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Definition
| Six leads that directly monitor electrodes on the arms and legs. Three are standard and three are augmented. Also called bipolar leads. |
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Definition
| An electrical connector between a specific combination of electrodes attached to the body. |
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Definition
| The contraction and relaxation phase of the heart. |
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Definition
| The surge of blood pushed into the ventricles as a result of atrial contraction. |
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Definition
| The point of the left ventricle of the heart at the level of the fifth intercostal space. |
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Definition
| Separates the left and right halves of the heart. |
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Definition
| The ability of a cardiac cell to receive an electrical stimulus and conduct that impulse to an adjacent cell. |
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Definition
| The ability of a cell to shorten, causing muscle contraction in response to an electrical stimulus. |
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Definition
| The ability of cardiac pacemaker cells to spontaneously initiate an electrical impulse without being stimulated from another source. |
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Definition
| The ability of cardiac muscle cells to respond to an outside stimulus. |
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Definition
| A pen-like instrument that moves on the ECG paper and uses heat instead of ink to record the impulses. |
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Definition
| The transmission of ECG signals via radio waves. |
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Definition
| A monitor or TV-type device that shows the tracing of the electrical activity of the heart. |
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Definition
| Moves the stylus up 10 mm. |
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Term
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Definition
| Allow you to adjust the speed to 50mm per second. ECG paper normally runs at 25 mm per second for adults. |
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Definition
| Electrodes placed on the right arm, left arm, and left leg. Leads I, II, III. |
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Definition
| A device that detects electrical charges. |
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Definition
| A positive or negative electrical state. |
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Definition
| The electrical state of the heart at rest. |
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Definition
| A change of polarity. The electrical discharge that precedes contraction. |
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Definition
| An indication of no electrical charge or activity between cardiac cycles. |
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Definition
| The restoration of a cell to its original pattern of charge. |
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Definition
| a small upward curve that represents the depolarization of the atria (and subsequent atrial contraction). It is the measure of the atrial rate. |
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Definition
| Correlates with the depolarization of the ventricles (and subsequent ventricular contraction). It is the measure of the ventricular rate. |
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Definition
| An upward curve that represents the recovery (repolarization ) of the ventricles. |
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Definition
| A small upward curve sometimes found after the T wave. Represents the slow recovery of Purkinje fibers. |
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Definition
| Represents the time it takes for the electrical impulse to travel from the sinoatrial (S-A) node to the A-V Node. |
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Definition
| Represents the time it takes for the ventricles to contract and recover. |
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Definition
| Connect the end of the QRS complex with The beginning of the T wave. Represents the time between contraction of the ventricles and recovery. |
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Definition
| Absence of cardiac electrical activity. Also known as a "flatline". |
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Definition
| The amount of blood ejected by the left ventricle into the aorta in 1 minute. |
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Definition
| Deviation up or down from zero on the isoelectric line (baseline). |
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Definition
| The height of a waveform on the CG, showing the degree of voltage variation from zero. |
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Definition
Deflections caused by electrical activity from sources other than the heart.
poor conduction, outside interference, Improper handling of tracing, a patient's movement/talking, or dirty sensors.
Causes: |
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Term
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Definition
A shift in the basdline from the center position for that lead.
Causes: muscle tremors and mechanical problems. |
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Definition
| Any marks on the paper that are not part of the tracing. |
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Term
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Definition
1. Alternating current (AC) caused by other types of interference.
2. AC interference due to ground circuits or incorrect grounding.
3. AC interference due to differences in electrical potential.
4. Shaking.
5. Zero-line fluctuations. |
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Term
| Determining heart rate of a strip |
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Definition
| Counting the number of QRS complexes in a 6-second strip and multiplying by 10. |
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Term
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Definition
| an irregularity, disturbance, or abnormality in heart rhythm. |
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Term
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Definition
| Placement outside the usual location. |
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Term
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Definition
| A beat having an ectopic focus. |
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Term
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Definition
| A site of impulse formation located somewhere other than the SA node. |
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Term
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Definition
| A type of arrhythmia in which every other beat is a ectopic or premature (or both). |
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Term
| Premature beat/contraction |
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Definition
A contraction that occurs early.
Three types: premature atrial contractions (PACs); premature junctional contractions (PJCs), and premature ventricular contractions (PVCs) |
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Definition
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Definition
| An abnormally slow and irregular cardiac rhythm. |
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Definition
| A heart rate slower than 60 beats per minute. |
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Definition
| An abnormally fast and irregular cardiac rhythm. |
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Definition
| A heart rate faster than 100 beats per minute. |
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Definition
| Incomplete, irregular, and rapid contraction of the atria between 350 to 500 times per minute. |
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Term
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Definition
| Contraction of the atria between 250 and 350 beats per minute. The P waves have a "sawtooth" appearance on the ECG. |
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Term
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Definition
| Cessation of coordinate ventricular contraction. On an ECG, it appears as a "sawtooth" image lacking P waves. |
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Definition
| Contraction of the ventricles between 150 to 300 times per minute. |
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Definition
| A heart rhythm established by impulses from the SA node. |
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Term
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Definition
| The failure of the SA node to function. It is also called sinus pause. The complete cardiac complex is absent from the ECG tracing. |
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Term
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Definition
| A usually benign fluctuation of the heart rate distinguished by a vagally influenced slowing of the cardiac rate during respiratory expiration and an increase during inspiration. |
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Term
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Definition
| They rhythm of a dying heart. Extremely slow and irregular and becoming slower to the point of asystole. |
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Definition
| A machine that produces and sends an electrical shock to the heart, intended to correct the electrical pattern of the heart. |
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Definition
| A device that delivers a small measure amount of electrical energy to cause myocardial depolarization. |
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Definition
| A portable ECG device that includes a small cassette recorder worn around a patient's waist to record the heart's electrical activity during normal daily activities. The test is given over a 24-hour period. |
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Definition
| Assessment of the heart's conduction system during physical exertion such as exercise. |
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Definition
| Tests the structure and function of the heart through the use of reflected sound waves. |
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Definition
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Definition
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Term
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Definition
| rupture of the heart wall |
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Term
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Definition
| location of the heart on the right side of the thorax |
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Term
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Definition
| drooping or falling of the heart at the normal location |
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Term
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Definition
| an increase in the size of the heart due to growth of the heart muscle tissue without an increase in the size of the heart chambers. |
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Term
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Definition
Damage to the conduction system of the heart resulting in abnormal conduction patterns.
Four types: first-degree; second-degree Type I (Mobitz I); Second-degree Type II (Mobitz II or Wenkebach); and Complete. |
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Term
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Definition
| Ballooning of the aorta caused by a weakened area of the vessel wall. |
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Term
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Definition
| The successful depolarization of an atrium or ventricle by an artificial pacemaker |
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Term
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Definition
| The administration of times electrical shocks for the purpose of correcting certain arrhythmias or restoring normal rhythm. |
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Term
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Definition
| surgical repair of the heart |
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Term
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Definition
| the suturing of the heart muscle |
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Term
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Definition
| A surgical procedure in which the blood supply from the nearby pectoral muscles of the chest is diverted directly to the coronary arteries. |
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