What are the symptoms of Myocardial Infarction (MI)?

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Last updated: May 1, 2025View editorial policy

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From the Guidelines

Symptoms of a myocardial infarction (heart attack) include chest pain or discomfort that feels like pressure, squeezing, fullness, or pain in the center or left side of the chest, lasting more than a few minutes or going away and coming back, as recommended by the most recent guidelines 1.

Key Symptoms

  • Pain or discomfort in one or both arms, the back, neck, jaw, or stomach
  • Shortness of breath
  • Cold sweat
  • Nausea
  • Lightheadedness
  • Fatigue

Less Typical Symptoms

  • Unusual fatigue
  • Sleep disturbances
  • Indigestion
  • Anxiety, particularly in women

Importance of Prompt Action

If you suspect a heart attack, call emergency services (911) immediately, then chew an aspirin (325 mg) if not allergic and wait for help, as prompt treatment is crucial to minimize heart muscle damage 1.

Risk Factors

  • Smoking
  • High blood pressure
  • High cholesterol
  • Diabetes
  • Family history
  • Age It is essential to be aware of all possible symptoms, especially in combination, to save lives, and to follow the most recent guidelines for the management of acute myocardial infarction 1.

From the Research

MI Symptoms

  • Chest pain, which travels from left arm to neck 2
  • Shortness of breath 2
  • Sweating 2
  • Nausea 2
  • Vomiting 2
  • Abnormal heart beating 2
  • Anxiety 2
  • Fatigue 2
  • Weakness 2
  • Stress 2
  • Depression 2

Treatment of MI

  • Aspirin to prevent blood from clotting 2, 3
  • Nitro-glycerin to treat chest pain and oxygen 2, 3
  • Thrombolytic or clot dissolving drugs such as tissue plasminogen activator, streptokinase or urokinase in blood within 3 h of the onset of a heart attack 2
  • Painkillers such as morphine or meperidine to relieve pain 2
  • Nitroglycerin and antihypertensive drugs such as beta-blockers, ACE inhibitors or calcium channel blockers to lower blood pressure and to improve the oxygen demand of heart 2, 4, 5
  • ECG, coronary angiography and X-ray of heart and blood vessels to observe the narrowing of coronary arteries 2

Prevention of MI

  • Controlling diet, fat, cholesterol, salt, smoking, nicotine, alcohol, drugs 2
  • Monitoring of blood pressure every week 2
  • Doing exercise every day 2
  • Loosing body weight 2

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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