[PSIO 485] - Final Exam Guide - Ultimate 43 pages long Study Guide!
29 Nov 2016
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The ecg records the overall spread of electricity through the heart via surface measurements. It collects only a portion of the signal from the heart. It is detected by electrodes at two different points, creating a lead: draw a standard tracing of an ecg, label the waves and describe what each wave represent. T- wave: ventricular repolarization: describe the differences you would see on an ecg strip of a person with tachycardia, normal sinus rhythm, and bradycardia. Tachycardia- faster than normal heart rate; qrs complexes in the ecg would be closer together. Normal sinus rhythm: normal distance between qrs complexes. Bradycardia: slower than normal heart rate, qrs complexes are farther apart: your mother comes to you and tells you she"s having heart palpitations . If she feels as if her heart skipped a beat, then it"s most likely a pvc (premature ventricular contraction). Atrial flutter- rapid but regular sequences of atrial depolarizations-p-waves show a saw-toothed appearance.
