Porter Health
Heart Attack (Myocardial Infarction) & Post-MI Care
A Patient's Guide to Recognizing, Treating, and Recovering from a Heart Attack
A heart attack (myocardial infarction or MI) happens when blood flow to part of your heart muscle is blocked, usually by a blood clot in a coronary artery. Without blood flow, that part of the heart muscle doesn't get oxygen and starts to die within minutes.
How a Heart Attack Happens:
Plaque (cholesterol, fat, calcium) builds up in coronary arteries over years
Plaque ruptures (breaks open), exposing the soft, fatty core
Blood clot forms at the rupture site, blocking the artery
Heart muscle downstream from blockage loses oxygen and starts to die
Time = Heart Muscle: The longer the artery stays blocked, the more heart muscle dies. Every minute counts! Immediate treatment can save your life and preserve heart function.
Heart Attack Statistics:
- 805,000 Americans have a heart attack each year
- Every 40 seconds, someone in the U.S. has a heart attack
- 1 in 5 heart attacks is "silent" (no obvious symptoms)
- Survival depends on how quickly you get treatment
CALL 911 IMMEDIATELY IF YOU EXPERIENCE ANY OF THESE SYMPTOMS:
Don't wait more than 5 minutes to call 911. Don't drive yourself - EMS can start treatment immediately.
Chest Discomfort
Pressure, squeezing, fullness, or pain in center of chest. May last more than a few minutes or come and go. May feel like heartburn or indigestion.
Discomfort in Other Upper Body Areas
Pain or discomfort in one or both arms, back, neck, jaw, or stomach.
Shortness of Breath
May occur with or without chest discomfort. Feeling like you can't catch your breath.
Cold Sweat
Breaking out in a cold sweat, clammy skin.
Nausea or Vomiting
Feeling sick to your stomach, sometimes with lightheadedness.
Lightheadedness or Dizziness
Feeling faint, dizzy, or unusually tired.
Women's Heart Attack Symptoms Can Be Different:
Women are more likely than men to have "atypical" symptoms:
- Unusual fatigue (may start days or weeks before)
- Sleep disturbances
- Shortness of breath without chest pain
- Back or jaw pain
- Nausea or vomiting
If something feels wrong, call 911. Don't dismiss it as "just anxiety" or "indigestion."
⚠️ CRITICAL:
- Call 911 immediately - Don't wait to see if symptoms go away
- Don't drive yourself - EMS can start life-saving treatment in the ambulance
- Chew aspirin - If not allergic, chew 325mg (4 baby aspirin) while waiting for ambulance
- Unlock door, sit down, stay calm - So paramedics can get to you easily
The goal of emergency treatment is to restore blood flow to your heart muscle as quickly as possible - ideally within 90 minutes of arriving at the hospital.
PCI (Percutaneous Coronary Intervention) - Preferred Method
Also called: Angioplasty, cardiac catheterization, "getting a stent"
How it works:
- Thread catheter through artery in wrist or groin to heart
- Inject dye to see blockage on X-ray (angiogram)
- Insert balloon catheter and inflate to open blockage
- Place stent (metal mesh tube) to keep artery open permanently
Goal time: "Door-to-balloon" within 90 minutes of hospital arrival
Clot-Busting Drugs (Thrombolytics)
Examples: tPA (tissue plasminogen activator), tenecteplase
When used: If PCI not available within 90 minutes (rural hospitals)
How it works: IV medication dissolves the blood clot blocking your artery
CABG (Coronary Artery Bypass Graft Surgery)
When needed: Multiple blocked arteries, left main artery blockage, failed PCI
How it works: Surgeon takes blood vessel from leg or chest and creates a "bypass" around blockages
Recovery: Open heart surgery, 6-12 week recovery, but excellent long-term results
"Fantastic Four" Medications After Heart Attack
These four medication classes have been proven to reduce your risk of another heart attack, prevent heart failure, and help you live longer. Most people should be on all four unless there's a specific reason not to.
Antiplatelet Therapy (Blood Thinners)
What they do: Prevent blood clots from forming on your stent or in arteries
CRITICAL: After stent, you'll be on dual antiplatelet therapy (DAPT):
- • Aspirin 81mg daily - LIFELONG (never stop)
- • P2Y12 inhibitor - For at least 12 months after stent:
- - Prasugrel (Effient) 10mg daily (stronger, more bleeding)
- - Ticagrelor (Brilinta) 90mg twice daily (stronger, more bleeding)
- - Clopidogrel (Plavix) 75mg daily (less potent, if can't tolerate others)
⚠️ NEVER stop these medications without talking to your cardiologist first! Stopping early can cause stent thrombosis (clot in stent) → fatal heart attack.
High-Intensity Statin
What they do: Lower LDL cholesterol, stabilize plaque, reduce inflammation, prevent another heart attack
Goal: LDL <70 mg/dL (ideally <55 mg/dL after heart attack)
High-intensity statins: Atorvastatin 40-80mg, rosuvastatin 20-40mg
Beta Blocker
What they do: Slow heart rate, reduce blood pressure, decrease heart's oxygen demand, prevent dangerous heart rhythms
Duration: Usually lifelong, especially if heart function reduced (low ejection fraction)
Examples: Metoprolol succinate (Toprol XL), carvedilol (Coreg), bisoprolol
ACE Inhibitor or ARB
What they do: Relax blood vessels, reduce blood pressure, protect heart from remodeling (scar formation), prevent heart failure
Especially important if: Ejection fraction <40%, diabetes, high blood pressure
Examples: Lisinopril, ramipril (ACE-I); losartan, valsartan (ARB)
Additional Medications You May Need:
- PCSK9 inhibitor: If LDL still >70 mg/dL on max statin (Repatha, Praluent - injections)
- Ezetimibe (Zetia): Add-on to statin to lower LDL further
- Blood pressure medications: If BP not at goal <130/80 mmHg
- Diabetes medications: If diabetic, SGLT2 inhibitor or GLP-1 agonist provide heart protection
Cardiac Rehab Reduces Death Risk by 25%!
Cardiac rehabilitation is a supervised program that combines exercise, education, and counseling. It's one of the most effective treatments after a heart attack, yet only 1 in 5 patients attend.
What Cardiac Rehab Includes:
Supervised Exercise
3 days/week for 12 weeks, monitored by nurses
Education
Heart-healthy eating, medication management, lifestyle changes
Counseling
Stress management, depression screening, emotional support
Risk Factor Management
BP monitoring, cholesterol tracking, weight management
Benefits of Cardiac Rehab:
Who Qualifies for Cardiac Rehab?
- Recent heart attack
- PCI/stent placement
- CABG surgery
- Heart failure
- Heart valve repair/replacement
Coverage: Medicare and most insurance cover cardiac rehab. Ask your doctor for a referral!
Your lifestyle choices are as important as your medications. Making these changes can cut your risk of another heart attack in half:
Quit Smoking
Smoking doubles your risk of another heart attack. Quitting is the single most important thing you can do.
Heart-Healthy Diet
Mediterranean diet: lots of vegetables, fruits, whole grains, fish, olive oil. Limit red meat, processed foods.
Exercise Regularly
30 minutes moderate activity, 5 days/week. Start cardiac rehab program!
Manage Stress
Chronic stress increases heart attack risk. Try meditation, yoga, deep breathing, counseling.
Control Blood Pressure
Target <130/80 mmHg. Monitor at home, take medications as prescribed.
Manage Diabetes
Keep HbA1c <7%. High blood sugar damages arteries further.
Lose Weight
If overweight, losing 5-10% of body weight improves all risk factors.
Limit Alcohol
No more than 1 drink/day (women) or 2 drinks/day (men).
Use this checklist to guide your conversation about heart attack recovery:
Time = Heart Muscle: Call 911 at first sign of heart attack symptoms
Women may have atypical symptoms (fatigue, nausea, back pain) - trust your instincts
Emergency treatment (PCI/stent) ideally within 90 minutes of hospital arrival
Four critical medications after heart attack: aspirin + P2Y12 inhibitor + statin + beta blocker + ACE-I/ARB
NEVER stop dual antiplatelet therapy early - risk of fatal stent thrombosis
Target LDL <70 mg/dL (ideally <55) with high-intensity statin
Cardiac rehabilitation reduces death risk by 25% - but only 20% attend
Quit smoking, eat heart-healthy, exercise regularly, manage stress
References:
Based on 2023 ACC/AHA/ACCP/ASPC/NLA/PCNA Guideline for the Management of Patients With Chronic Coronary Disease and AHA Guidelines for Cardiopulmonary Resuscitation and Emergency Cardiovascular Care. This guide translates clinical guidelines into patient-friendly language.
American Heart Association. Warning Signs of a Heart Attack. Accessed 2024. | O'Gara PT, et al. 2013 ACCF/AHA Guideline for the Management of ST-Elevation Myocardial Infarction. Circulation. 2013;127(4):e362-e425.