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Definition
| Saclike expansion of a blood vessel wall. |
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| Condition characterized by thoracic pain resulting from occluded coronary arteries; precedes a heart attack. |
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Definition
| Surgical procedure for treating clogged arteries in which a plastic tube is threaded through a major blood vessel toward the heart and then a balloon at the end of the tube is inflated, forcing open the vessel. A stent is then placed in the vessel. |
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Definition
| Major systematic artery that receives blood from the left ventricle. |
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Definition
| Vessel that takes blood from an artery to capillaries. |
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Definition
| A pathway, usually abnormal, that connects an artery directly to a vein. |
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Definition
| Condition in which fatty substances accumulate abnormally beneath the inner linings of the arteries. |
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Definition
| Group of specialized fibers that conduct impulses from the atrioventricular node to the ventricles of the heart. |
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Definition
| Valve located between the atrium and the ventricle. |
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Definition
| One of the upper chambers of the heart that receives blood. |
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Definition
| Small region of neuromuscular tissue that transmits impulses received from the sinoatrial node to the ventricles. |
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Definition
| Force of blood pushing against the inside wall of a vessel. |
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Definition
| One complete cycle of systole and diastole for all heart chambers. |
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Definition
| Tough bands of connective tissue that attach the papillary muscles to the atrioventricular valves within the heart. |
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Definition
| Artery that supplies blood to the wall of the heart. |
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Term
| coronary bypass operation |
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Definition
| Therapy for blocked coronary arteries in which part of a blood vessel from another part of the body is grafted around the obstructed artery. |
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Term
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Definition
| Includes arrangement of protein fibers that tightly hold the membranes of adjacent cells together and prevent overstretching. |
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Term
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Definition
| Relaxation period of a heart chamber during the cardiac cycle. |
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Definition
| Arterial blood pressure during the diastolic phase of the cardiac cycle. |
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Term
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Definition
| Recording of the electrical activity associated with the heartbeat. |
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Term
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Definition
| Moving blood clot that is carried through the bloodstream. |
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Definition
| Junction between cells formed by the joining of two adjacent plasma membranes; it lends strength and allows ions, sugars, and small molecules to pass between cells. |
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Definition
| Muscular organ located in the thoracic cavity whose rhythmic contractions maintain blood circulation. |
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Definition
| Damage to the myocardium due to blocked circulation in the coronary arteries, also called a myocardial infraction. |
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Definition
| Syndrome characterized by distinctive symptoms and signs resulting from disturbances in cardiac output of from increased pressure in the veins. |
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Definition
| Vein leading to the liver and formed by the merging blood vessels leaving the small intestine. |
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Definition
| Vein that runs between the liver and the inferior vena cava. |
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Definition
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Definition
| Large vein that enters the right atrium from below and carries blood from the trunk and lower extremities. |
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Definition
| Fluid, derived from tissue fluid, that is carried in lymphatic vessels. |
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Term
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Definition
| Organ system consisting of lymphatic vessels and lymphatic organs that transport lymph and lipids; aids the immune system. |
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Term
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Definition
| The middle of the three layers of the wall of the heart; composed of cardiac muscle. |
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Term
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Definition
| Protective serous membrane that surrounds the heart. |
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Term
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Definition
| Accumulation of soft masses of fatty material, particularly cholesterol, beneath the inner linings of the arteries. |
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Term
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Definition
| Smooth muscle ring that controls blood flow through a capillary bed. |
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Definition
| Blood vessel that takes blood away from the heart to the lungs. |
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Definition
| Circulatory pathway that consists of the pulmonary trunk, the pulmonary arteries, and the pulmonary veins; takes oxygen-poor blood from the heart to the lungs and oxygen-rich blood from the lungs to the heart. |
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Definition
| Blood vessel that takes blood from the lungs to the heart. |
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Definition
| Vibration felt in arterial walls due to expansion of the aorta following ventricle contraction. |
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Term
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Definition
| Specialized muscle fibers that conduct the cardiac impulse from the AV bundle into the ventricles. |
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Definition
| Mechanism whereby reductions in thoracic pressure during the breathing cycle tend to aid the return of blood to the heart from peripheral veins. |
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Definition
| Small region of neuromuscular tissue that initiates the heartbeat; also called the pacemaker. |
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Definition
| Valve resembling a half moon located between the ventricles and their attached vessels. |
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Definition
| Wall between two cavities; in the human heart, a septum separates the right side from the left side. |
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Definition
| Pumping effect of contracting skeletal muscles on blood flow through underlying vessels. |
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Definition
| Condition resulting when an arteriole in the brain bursts or becomes blocked by an embolism; also called cerebrovascular accident. |
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Term
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Definition
| Large vein that enters the right atrium from above and carries blood from the head, thorax, and upper limbs to the heart. |
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Term
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Definition
| Blood vessels that transport blood from the left ventricle and back to the right atrium of the heart. |
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Term
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Definition
| Contraction period of the heart during the cardiac cycle. |
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Term
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Definition
| Arterial blood pressure during the systolic phase of the cardiac cycle. |
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Term
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Definition
| Obstruction of a blood vessel by a thrombus that has dislodged from the site of its formation. |
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Term
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Definition
| Blood clot that remains in the blood vessel where it formed. |
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Term
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Definition
| Fluid that surrounds the body’s cells; consists of dissolved substances that leave the blood capillaries by filtration and diffusion. |
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Term
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Definition
| A mechanical replacement for the heart, as opposed to a partial replacement. |
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Term
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Definition
| Poisonous substance produced by living cells or organisms. Toxins are nearly always proteins that are capable of causing disease on contact or absorption with body tissues. |
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Term
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Definition
| Membranous extension of a vessel of the heart wall that opens and closes, ensuring one-way flow. |
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Term
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Definition
| Cavity in an organ, such as a lower chamber of the heart or the ventricles of the brain. |
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Definition
| Vessel that takes blood from capillaries to a vein. |
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