Francis Morris, William J. Brady, Visit Amazon's A. John's ABC of Clinical Electrocardiography PDF

By Francis Morris, William J. Brady, Visit Amazon's A. John Camm Page, search results, Learn about Author Central, A. John Camm,

ISBN-10: 0727915363

ISBN-13: 9780727915368

(BMJ Books) Quick-reference textual content permits readers to familiarize yourself with the wide variety of electrocardiogram styles noticeable in scientific perform. For these mostly perform or in hospitals coping with sufferers with center problems. Softcover.

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Extra resources for ABC of Clinical Electrocardiography

Sample text

It may be a variant of normal or be due to cardiac or non-cardiac disease. A correct diagnosis has obvious advantages for the patient but is also particularly important before the use of thrombolytic treatment so that unnecessary exposure to the risks of thrombolytic drugs can be avoided. The interpretation of ST segment elevation should always be made in the light of the clinical history and examination findings. There are often clues in the electrocardiogram to differentiate the ST segment elevation of acute ischaemia from other causes; for example, reciprocal changes (see last week’s article) may be present, which strongly indicate acute ischaemia.

40 When complete atrioventricular block occurs in association with acute anterior myocardial infarction, transvenous cardiac pacing is recommended 11 Exercise tolerance testing Jonathan Hill, Adam Timmis Exercise tolerance testing is an important diagnostic and prognostic tool for assessing patients with suspected or known ischaemic heart disease. During exercise, coronary blood flow must increase to meet the higher metabolic demands of the myocardium. Limiting the coronary blood flow may result in electrocardiographic changes.

Reciprocal changes are most frequently seen when the infarct is large, and they may reflect an extension of the infarct or occur as a result of coexisting remote ischaemia. Alternatively, it may be a benign electrical phenomenon. The positive potentials that are recorded by electrodes facing the area of acute injury are projected as negative deflections in leads opposite the injured area, thus producing a “mirror image” change. Extensive reciprocal ST segment depression in remote regions often indicates widespread arterial disease and consequently carries a worse prognosis.

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ABC of Clinical Electrocardiography by Francis Morris, William J. Brady, Visit Amazon's A. John Camm Page, search results, Learn about Author Central, A. John Camm,

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