NURS 3014 Lecture Notes - Lecture 5: Catecholamine, Supraventricular Tachycardia, Autonomic Nervous System
23 May 2017
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It also constricts peripheral blood vessels, thereby increasing blood pressure: exercise, stress/anxiety, medications (catecholamine"s, caffeine, fever, pns stimulation decreases heart rate, av contraction and force of myocardial contraction. It also causes vasodilation, lowering the blood pressure: medications (beta blockers, calcium channel blockers, vagal response (vomiting, suctioning, severe pain, extreme emotions) ** manipulation of the ans may increase or decrease incidence of dysrhythmias. Increased sns stimulation may increase incidence, while decreased stimulation may decrease incidence. The electrocardiogram: the electrical impulse that travels through the heart can be viewed by means of an. Ecg: each phase of the cardiac cycle is reflected by specific waveforms on the screen of a cardiac monitor/strip of ecg graph paper. ** an ecg strip is usually 6 seconds in length. One big box is typically 0. 2 seconds, composed of 5 little boxes that are 0. 04 seconds. Each little box is 1mm in length, making a big box 5mm. Is normal and may be precipitated by caffeine.
