What is the difference between a heart attack and a myocardial infarction?

Ischemia results when the heart muscle is starved for oxygen and nutrients. When damage or death of part of the heart muscle occurs as a result of ischemia, it’s called a heart attack, or myocardial infarction (MI). About every 40 seconds, someone in the United States has a heart attack.

What is an MI in the heart?

A heart attack (myocardial infarction) happens when one or more areas of the heart muscle don’t get enough oxygen. This happens when blood flow to the heart muscle is blocked.

How does an MI occur?

Myocardial infarction (MI) usually results from an imbalance in oxygen supply and demand, which is most often caused by plaque rupture with thrombus formation in an epicardial coronary artery, resulting in an acute reduction of blood supply to a portion of the myocardium.

What happens during an MI?

If a blood clot totally blocks the artery, the heart muscle becomes “starved” for oxygen. Within a short time, death of heart muscle cells occurs, causing permanent damage. This is called a myocardial infarction (MI), or heart attack.

How is MI diagnosed?

Acute myocardial infarction is myocardial necrosis resulting from acute obstruction of a coronary artery. Symptoms include chest discomfort with or without dyspnea, nausea, and diaphoresis. Diagnosis is by ECG and the presence or absence of serologic markers.

What are the 5 types of myocardial infarction?

ST segment elevation myocardial infarction (STEMI) non-ST segment elevation myocardial infarction (NSTEMI) coronary spasm, or unstable angina.

How long does mi pain last?

The pain associated with MI is usually diffuse, does not change with position, and lasts for more than 20 minutes. It might be described as pressure, tightness, knifelike, tearing, burning sensation (all these are also manifested during other diseases).

What laboratory test are positive indicators of MI?

Cardiac Troponin I or Troponin T – which are both very sensitive and specific and are the recommended laboratory tests for the diagnosis of MI. Serial testing is recommended in order to confirm or exclude a rise or fall in troponin concentration.

What are the early signs of heart disease?

Signs and symptoms can include:

• Chest pain, chest tightness, chest pressure and chest discomfort (angina)
• Shortness of breath.
• Pain, numbness, weakness or coldness in your legs or arms if the blood vessels in those parts of your body are narrowed.
• Pain in the neck, jaw, throat, upper abdomen or back.

Which complication is most likely to occur after a myocardial infarction MI )?

Ventricular free wall rupture. VFWR is the most serious complication of AMI. VFWR is usually associated with large transmural infarctions and antecedent infarct expansion. It is the most common cause of death, second only to LV failure, and it accounts for 15-30% of the deaths associated with AMI.

How is MI patient treated?

A patient with a large acute myocardial infarction may be concurrently treated with aspirin, streptokinase, heparin and an ACE inhibitor. 2. Streptokinase is preferred to tissue plasminogen activator as it has a greater effect on cardiovascular mortality.

Can you have an MI without ECG changes?

NSTEMI is diagnosed in patients determined to have symptoms consistent with ACS and troponin elevation but without ECG changes consistent with STEMI. Unstable angina and NSTEMI differ primarily in the presence or absence of detectable troponin leak.