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Causes and diagnosis of tachyarrhythmias 

Causes and diagnosis of tachyarrhythmias
Chapter:
Causes and diagnosis of tachyarrhythmias
Author(s):

Allan J. Walkey

and David D. McManus

DOI:
10.1093/med/9780199600830.003.0155
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date: 01 December 2020

Tachyarrhythmias occur during approximately 12% of medical and surgical intensive care unit hospitalizations. The haemodynamic, metabolic, autonomic, inflammatory, and pharmacological factors associated with critical illness may act as arrhythmia triggers. The occurrence of new tachyarrhythmia in a critically-ill patient may be associated with an acute decrease in cardiac output, resulting in haemodynamic instability, an event that often results in increased morbidity and mortality. Accurate electrocardiographic arrhythmia diagnosis is necessary for instituting effective therapy. This chapter reviews the various strategies for identifying the causes, and obtain accurate diagnosis for supraventricular and ventricular tachyarrhythmias that commonly occur during critical illness.

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