Word: clot
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...Critical Hours. The most critical is the period for first the few victim hours of a after the coronary blood attack clot (thrombus) has formed in a coronary artery, cutting off the blood supply to one section of the heart muscle. If the patient is moved too soon after such an attack he may die of any one of a variety of immediate causes: a state of shock, ventricular fibrillation (a disorder of the heart rhythm in which the heart ceases to act as a pump) or, less often, the choking of the heart's action from the leakage...
...white blood cell count. But as the scar tissue-in Ike's case forming in the front wall of the heart-becomes stronger and more dead cells disappear, temperature and blood count return to normal. At the same time, the heart is developing collateral circulation. Immediately after a clot forms, the pressure drops in the area beyond it, and blood enters the area by alternate routes, such as already-existing interconnecting channels (see chart). Later, new arteries may grow into the area, and after that a new channel may even grow through the clot...
...result of the thickening and roughening of the intima is to impede, or even stop, the passage of blood through the artery in which the condition exists. As the volume and surge of the blood decrease, a clot may form, often quite suddenly, around one of the rough projections that has grown on the arterial wall. The clot is a thrombus, the process of its formation is thrombosis, and if it happens in one of the coronary arteries, it is coronary thrombosis (while there are medical distinctions in their precise use, the terms "coronary occlusion" and "cardiac infarction" are generally...
...When a clot has caused a stoppage in a coronary artery, the area of heart muscle fed by that artery dies, just as, for example, the tissue of a finger dies if cut off from its blood supply. The damage is permanent, and its severity depends greatly on the size of the affected artery and the speed and completeness of the occlusion. If the artery in which the clot forms is small enough, a person may live to old age unaware of the thrombosis. If the closing of the artery occurs slowly enough, nearby arteries may grow in size...
...When a blood clot in a coronary artery causes a heart attack, one result may be an aneurysm-something like a big blister-bulging from the heart muscle. Drs. William Likoff and Charles P. Bailey of Philadelphia's Hahnemann Hospital report what is believed to be the first successful operation to remove one. A man of 56, formerly bedridden, has been, able to climb stairs without distress since the operation 15 months...