INTRODUCTION HISTORY ECG GRAPH PAPER FILTER SELECTION LEADS WAVES & INTERVALS SYMPTOMS IN THE CASE OF ECG TESTED USES OF ECG . IS ECG DANGEROUS . WHAT TO EXPECT . CONCLUSION . REFERENCE ECG is a test that measures the electrical activity of the heart. The heart is a muscular organ that beats in rhythm to pump the blood through the body . In an ECG test, the electrical impulses made while the heart is beating are recorded and usually shown on a piece of paper . This is known as an "electrocardiogram". HISTORY ECG GRAPH An ECG runs at a paper speed of 25 mm/s, although faster paper speeds are occasionally used. Each small block of ECG paper is 1 mm² . At a paper speed of 25 mm/s, one small block of ECG paper translates into 0.04 s . FILTER SECTION LEADS LEADS Graphic showing the relationship between the positive electrodes . WAVES & INTERVALS Schematic representation of normal ECG . 1 . Heart rate : 50 to 100 beats per minute. 2 . Rh...
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