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Definition
| (AV valves) located between the atrial and ventrical chambers on each side; prevents backflow into the atria when the ventricals contract |
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| aka-mitral valve-left AV valve; consists of 2 flaps endocardium |
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| right AV valve, has 3 flaps |
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| tiny white cords that anchor the flaps to the walls of ventricle |
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Definition
| pulmonary and aortic semilunar valves; guards the bases of the 2 large arteries leaving the ventricular chambers; prevents arterial blood from re-entering the heart |
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Definition
| bacterial infection of the endocardium |
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Definition
| Supplies oxygenated blood to the walls of the ventricles and the right atrium. |
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| Directs oxygenated blood to the left anterior descending artery and the left circumflex. |
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Definition
| The coronary sinus is a collection of veins joined together to form a large vessel that collects blood from the myocardium of the heart. It is present in all mammals, including humans. It delivers deoxygenated blood to the Right atrium in conjunction with the superior and inferior vena cava. |
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| a region of dead, deteriorating tissue resulting from a lack of blood supply |
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Definition
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Term
| intrinsic conduction system |
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Definition
| aka nodal system- a system built into the heart tissue that sets basic rhythm; composed of a special tissue that is nowhere else in the body; causes heart muscle depolarization in only one direction; from the atria to the ventricles; enforces75 beats per minute |
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Term
| components of the intrinsic conduction system |
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Definition
| sinoatrial node-located in the right atrium atrioventricular node-located at the junction of the atria and ventricles atrioventricular bundle right and left bundle branches- located -interventricular septum |
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Definition
| the loss of a state of polarity; the loss of a negative charge inside the plasma membrane |
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Definition
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The aortic semilunar valve is located between the left ventricle and the aorta.
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The aortic semilunar valve also has three flaps (cusps). Once the left ventricle contracts the aortic valve is opened, allowing the oxygenated blood to pour into the aorta. Like the other semilunar valve, the aortic valve only allows the blood to flow in one direction.
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Definition
| any of the veins returning the blood from the tissues of the heart that open into the right atrium either directly or through the coronary sinus |
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Definition
| a deflection in the electrocardiogram produced by excitation of the atria. |
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Term
| Pulmonary semilunar valve |
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Definition
| The pulmonary valve (sometimes referred to as the pulmonic valve) is the semilunar valve of the heart that lies between the right ventricle and the pulmonary artery and has three cusps. |
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Definition
| the second major deflection of the normal surface electrocardiogram, reflecting the potential variations occurring with repolarization of the ventricles |
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Definition
| low heart rate; less than 60 beats per minute |
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Definition
| refers to the events of one complete heartbeat; length of a cardiac sycle is 0.8 seconds |
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Definition
| The normal rhythmically occurring relaxation and dilatation(enlarging) of the heart chambers, especially the ventricles, during which they fill with blood. |
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Definition
| a rapid, uncoordinated shuddering of the heart muscles (looks like a bag of worms); makes the heart totally useless; causes death from heart attacks |
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Definition
| impaired transmission of impulses from the atrium to the ventricle |
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Definition
| lack of adequate blood supply to the heart muscle |
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Definition
| abnormal or unusual heart sounds |
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Definition
| contraction of the ventricles |
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Definition
| rapid heart rate over 100 beats per minute |
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