Word: cardiac
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Unfortunately, an ECG by itself won't necessarily pick up any signs of blockages in the coronary arteries unless there has already been some damage to the cardiac muscle. Hidden cases of heart disease can sometimes be spotted by performing an ECG while the subject is exercising on a treadmill--the so-called stress test. The greater the demand placed on the heart, the more likely a problem will turn up. Using ultrasound or radioactive dyes during a stress test may provide more clues--by showing how well the arteries are supplying blood to various parts of the heart...
...what heart failure is not. It's not a heart attack, in which something, usually a clot, blocks the flow of blood through one or more of the coronary arteries--though the damage from a heart attack can be severe enough to cause heart failure. It's also not cardiac arrest, in which the electrical signals that govern the heart become so disorganized the heart can no longer pump blood through its chambers--though patients with heart failure are at much greater risk of dying from cardiac arrest...
RECOVERING. ROBERT ATKINS, 71, diet doctor and author of the controversial high-protein-, high-fat-, low-carb-promoting Dr. Atkins' New Diet Revolution; from cardiac arrest related to cardiomyopathy, a heart infection unrelated to diet; after a brief hospitalization; in New York City...
...sexes, it seems, does not extend to matters of the heart. A new study suggests that men and women have strikingly different vulnerabilities to heart attack. For women, emotional stress from, say, divorce or the death of a loved one is more likely than physical stress to trigger sudden cardiac arrest. For men, the opposite is true. What accounts for the difference? Researchers suspect that levels of adrenaline, which can cause the heart to beat abnormally fast, probably shoot up in women when they're upset and in men when they're doing the heavy lifting...
...fairly frequent basis last year, technicians at Massachusetts General Hospital injected 40 milligrams of cocaine directly into the bloodstream of cocaine addicts. With a set of defibrillators kept handy in case of cardiac arrest, the addicts were given MRIs and monitored for changes in heart rate and blood pressure. The subjects walked out of the hospital with some information on drug addiction, their anonymity and a gift certificate for $260 to a supermarket in exchange for a promise not to use any more cocaine that...