Blood Pressure Management in Acute Myocardial Infarction

Initial Management

• For patients receiving thrombolytic therapy, blood pressure should be lowered to less than 185/110 mmHg before initiating therapy, and maintained below 180/105 mmHg for at least the first 24 hours, as recommended by the American Heart Association 1, 2
• For patients not receiving thrombolytic therapy with blood pressure ≥220/120 mmHg, consider lowering blood pressure by approximately 15% during the first 24 hours, according to the American College of Cardiology 3, 1
• For patients not receiving thrombolytic therapy with blood pressure <220/120 mmHg, initiating or reinitiating antihypertensive treatment within the first 48-72 hours is not recommended unless there are specific comorbid conditions requiring blood pressure control, as stated by the American Heart Association 2, 4

Rationale and Evidence

• Cerebral autoregulation may be impaired during acute events, making rapid blood pressure reduction potentially harmful as it can reduce perfusion to vital organs, as noted by the American College of Cardiology 5, 6

Long-term Management

• After the acute phase (>48-72 hours), antihypertensive therapy should be initiated or restarted for patients with blood pressure >140/90 mmHg who are neurologically stable, as recommended by the American Heart Association 1, 2
• Long-term blood pressure control is essential for secondary prevention of cardiovascular events, according to the American Heart Association 2
• A target blood pressure of <130/80 mmHg may be reasonable for long-term management after the acute phase, as suggested by the American Heart Association 2