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By Springhouse
This quick-reference instruction manual provides the fundamental, need-to-know evidence on ECG interpretation in an easy-to-scan bulleted layout, with anatomical illustrations and 1000s of waveforms in quite a few medical shows. The ebook presents step by step directions on employing electrodes, deciding upon leads, and acting 12-lead ECGs and provides guidance for speedily and thoroughly analyzing ECGs.
All universal arrhythmias are graphically illustrated, and a rapid-scan method for arrhythmia id is given. insurance contains drug results on ECGs and the way pacemaker waveforms seem on ECGs. Appendices comprise a brief consultant to arrhythmias, an summary of cardiac medicinal drugs, the depolarization-repolarization cycle, motion strength curves, the cardiac conduction procedure, and an arrhythmia chart with most sensible tracking lead.
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Additional info for Just the Facts: ECG Interpretation
Sample text
If the gel is dry, apply new electrodes. ◆ Replace faulty wires or cables. qxd 8/28/08 30 6:22 PM Page 30 Basic electrocardiography Normal sinus rhythm ◆ The norm against which all other rhythms are compared. ◆ Records an impulse that progresses to the ventricles through the normal conduction pathway. Recognizing normal sinus rhythm Electrocardiogram characteristics ◆ Rhythm – Atrial rhythm regular. – Ventricular rhythm regular. ◆ Rate – 60 to 100 beats/minute. – Sinoatrial node’s normal firing rate.
Dobutamine. – Dopamine. – Epinephrine. – Isoproterenol. Lifestyle choices: – Alcohol. – Caffeine. – Nicotine. Clinical significance ◆ Depends on the underlying cause. ◆ None if results from exercise or strong emotions. ◆ May resolve spontaneously when condition (hypovolemia, hemorrhage, pain) resolves. ◆ May be serious if persistent, especially if it occurs with acute myocardial infarction. qxd 8/28/08 42 4:53 PM Page 42 Sinus node arrhythmias Signs and symptoms ◆ ◆ ◆ ◆ Peripheral pulse rate above 100 beats/minute.
Normal configuration. ◆ T wave – Normal size. – Normal configuration. ◆ QT interval – Within normal limits. – May be prolonged. ◆ Other – None. Causes ◆ Noncardiac disorders: – Glaucoma. – Hyperkalemia. – Hypothermia. – Hypothyroidism. – Increased intracranial pressure. ◆ Conditions that increase vagal stimulation or decrease sympathetic stimulation: – Carotid sinus massage. – Deep relaxation. qxd 36 8/28/08 4:53 PM Page 36 Sinus node arrhythmias – Sleep. – Valsalva’s maneuver. – Vomiting. ◆ Cardiac diseases: – Cardiomyopathy.