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Electrocardiogram or Electrocardiograph (ECG or EKG) detects small electrical signals given off by the heart during contraction. The machine is used to measure the rate in which the heart beats and the regularity of the beating.
Electrocardiogram or Electrocardiograph (ECG or EKG) detects small electrical signals given off by the heart during contraction. The machine is used to measure the rate in which the heart beats and the regularity of the beating.
It is called a "stress test" and used with an electrocardiograph (ECG) to help determine what treatments are required for heart problems, such as angina or narrowing of the coronary arteries.
A Winchester model 1894 rifle that was made during the World War II years 1942-1948 will bring 550 dollars in the condition you describe.
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During atrial systole, the SA node ( power house for heart to keep on beating) is unable to send signals to ventricles. But heart has some back up power houses which take over, so the ventricles can still keep on beating but at a slower rate than normal during atrial asystole.
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