What is the role of blood pressure in the evaluation of symptoms of myocardial infarction (MI, heart attack)?

Updated: May 07, 2019
  • Author: A Maziar Zafari, MD, PhD, FACC, FAHA; Chief Editor: Eric H Yang, MD  more...
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In general, the patient's blood pressure is initially elevated (hypertension because of peripheral arterial vasoconstriction resulting from an adrenergic response to pain, anxiety, and ventricular dysfunction). However, it is not uncommon to have increased blood pressure as the precipitant of acute MI.

Alternatively, hypotension can also be seen. Usually this indicates either right ventricular MI or severe left ventricular dysfunction due to a large infarct area or impaired global cardiac contractility.

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