Word: aortic
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...Denver's National Jewish Hospital showed that her heart's left ventricle had become enlarged by having to pump against the resistance of a narrowed aorta. She was too ill for an operation then. Even more disturbing, the doctors diagnosed Ro Anne's aortic abnormality as a form in which the great artery is narrowed just above the point where it leaves the heart, close to the aortic valve. This is such a rare condition* that in the U.S. only a scant half-dozen operations had been done to correct...
...principle of the heart's "kick" is as simple as the thrust of a rocket: with each beat, blood rushes upward and strikes the aortic arch (where the great artery curves downward). The impact is great enough to give the whole body an upthrust. Almost simultaneously, acceleration of the blood directed downward by the aortic arch adds to the upthrust. When the descending blood slows down, there is a rebound effect which gives the body a downthrust, about half as intense as the earlier upthrust...
...Evidently the bullet had hit a rib, lost its momentum, entered the pulmonary vein carrying oxygenated blood from the lungs to the heart's upper left chamber. Car ried along with the blood, the slug went through the mitral valve into the left ventricle and up through the aortic valve. It turned downward at the aorta's arch in the upper chest, and traveled through the femoral artery until this became too nar row. Then the bullet stopped behind the left knee. Surgeons had no difficulty removing it. Military surgeons who treated hundreds of wartime wounded said that...
...tube that tapers in diameter from 3.2 mm. down to 1.6 mm. at its tip. The catheter is first inserted in the patient's brachial artery, inside the elbow of the right arm, and maneuvered up the arm into the chest, until its passage is stopped by the aortic valve, directly above the heart. Except for a dull ache in the elbow (local anesthesia is administered) the operation is painless Because the arterial nerves are insensitive to the catheter's presence...
...Richardson, 32, wife of a Jacksonville truck driver, had blackouts for years before she went to Boston's famed Peter Bent Brigham Hospital in 1958. Doctors found that she had, in severe form, a two-pronged heart defect: because of hardening and scarring (perhaps from rheumatic fever), the aortic valve does not open wide enough to let out a full supply of blood, and at the same time it does not close tight enough to keep blood from sloshing back into the heart and adding to its work load...