What does a large S wave indicate?

What does a large S wave indicate?

This vector is determined by electrical activation of the basal region of both ventricles and by depolarisation of the RVOT. A prominent S-wave in lead I is typically present in cases of congenital heart disease, valvular heart disease, and cor pulmonale that cause right ventricular enlargement and fibrosis.

What does the S wave on an ECG represent?

the R wave reflects depolarization of the main mass of the ventricles –hence it is the largest wave. the S wave signifies the final depolarization of the ventricles, at the base of the heart.

What do tall R waves mean?

If the leftward vector decreases in magnitude, it will show up on the surface ECG as a higher amplitude rightward depolarization. This is the mechanism by which decreased muscle mass can result in a tall R wave in V1. The common etiology is a posterior myocardial infarction (MI).

What does a notched S wave mean?

Abstract Fragmented QRS

What does S wave stand for?


What causes poor R wave progression?

Recent studies have shown that poor R-wave progression has the following four distinct major causes: AMI, left ventricular hypertrophy, right ventricular hypertrophy, and a variant of normal with diminished anterior forces. Standard ECG criteria that identify and distinguish these causes have been developed.

Is poor R wave progression bad?

The widely used term “poor R-wave progression” is not helpful. In many cases the abnormally low R amplitude extending from the right into the mid or left precordial leads indicates myocardial infarction of the anterior wall.

Is poor R wave progression serious?

Poor R-wave progression is a common ECG finding that is often inconclusively interpreted as suggestive, but not diagnostic, of anterior myocardial infarction (AMI).

Can poor R wave progression be normal?

Poor R wave progression (PRWP) is a relatively common electrocardiogram (ECG) finding in adults, occurring in as many as 10% of all hospitalized patients1). PRWP indicates possible prior anterior myocardial infarction (MI); however, it is observed frequently in apparently normal individuals.

What does R wave progression indicate?

Poor R Wave Progression Overview Poor R-wave progression (PRWP) is a common ECG finding that is often inconclusively interpreted as suggestive, but not diagnostic, of anterior myocardial infarction (AMI). PRWP is defined by R wave height ≤ 3 mm in V3.

What is abnormal ECG?

An abnormal EKG can mean many things. Sometimes an EKG abnormality is a normal variation of a heart's rhythm, which does not affect your health. Other times, an abnormal EKG can signal a medical emergency, such as a myocardial infarction (heart attack) or a dangerous arrhythmia.

What does anterior myocardial infarction mean?

An anterior wall myocardial infarction — also known as anterior wall MI, or AWMI, or anterior ST segment elevation MI, or anterior STEMI — occurs when anterior myocardial tissue usually supplied by the left anterior descending coronary artery suffers injury due to lack of blood supply.

Is anterior infarct serious?

In the United States, between 1.

How long can you live with myocardial infarction?

About 68.

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

This blood clot can block the blood flow through the artery to the heart muscle. 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).

What are the warning signs of a myocardial infarction?


  • Pressure, tightness, pain, or a squeezing or aching sensation in your chest or arms that may spread to your neck, jaw or back.
  • Nausea, indigestion, heartburn or abdominal pain.
  • Shortness of breath.
  • Cold sweat.
  • Fatigue.
  • Lightheadedness or sudden dizziness.

What is the drug of choice for myocardial infarction?

Analgesia and anti-emetics. The pain of myocardial infarction is usually severe and requires potent opiate analgesia. Intravenous diamorphine 2.

Can you survive a myocardial infarction?

Acute myocardial infarction (MI) is associated with a 30% mortality rate; about 50% of the deaths occur prior to arrival at the hospital. An additional 5-10% of survivors die within the first year after their myocardial infarction.

Can a heart attack kill instantly?

As your blood stops circulating, your brain, lungs and other vital organs are starved of oxygen so you soon lose consciousness and stop breathing. Without emergency treatment you can die within minutes.

Why do heart attacks happen at night?

Why is the risk also higher during the last part of sleep? Usually, during the night, the cardiovascular system is "sleeping," which is characterized by low blood pressure and heart rate.

Which sleep position is best for heart?

Similarly, sleeping on your left side, specifically, could help the flow of blood to your heart. When your heart pumps blood out to your body, it gets circulated and then flows back to your heart on the right side, Winter explains.

What does female heart attack feel like?

Uncomfortable pressure, squeezing, fullness or pain in the center of your chest. It lasts more than a few minutes, or goes away and comes back. Pain or discomfort in one or both arms, the back, neck, jaw or stomach. Shortness of breath with or without chest discomfort.

What are the warning signs of heart problems?

Especially watch out for these problems:

  • Chest Discomfort. It's the most common sign of heart danger. ...
  • Nausea, Indigestion, Heartburn, or Stomach Pain. ...
  • Pain that Spreads to the Arm. ...
  • You Feel Dizzy or Lightheaded. ...
  • Throat or Jaw Pain. ...
  • You Get Exhausted Easily. ...
  • Snoring. ...
  • Sweating.