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Doctor insights on: Can A Person Have A Heart Attack And An Ekg Not Detect It

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Can a person have a heart attack, but have a normal ekg?

Can a person have a heart attack, but have a normal ekg?

Yes: Especially early in the course of a heart attack the ekg can be normal. Usually some abnormalities become present with time. A heart attack cannot be excluded based on the ekg alone.

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Dr. Creighton Wright
1,177 doctors shared insights

Myocardial Infarction (Definition)

Myocardial Infarction means some of the heart muscle dies because of insufficient oxygen supply. Most often this occurs because the coronary artery is blocked by plaque & clot. Other causes include tears in the artery wall, extremely high oxygen demand (eg, rapid arrhythmia, heart valve disorder, or severe systemic illness.) Prompt treatment can minimize heart damage & ...Read more


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What would a person see on an EKG of someone who is having a heart attack?

What would a person see on an EKG of someone who is having a heart attack?

Impossible: There are numerous diagnosable problems seen on ekg during and after a myocardial infarction. The question here on this simple app, however, is way too broad and too ambiguous to answer with any confidence.

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How can an EKG if i'm having a heart attack?

How can an EKG if i'm having a heart attack?

ST Elevation: Changes on an ekg can be highly suggestive of a heart attack (especially major ones called st elevation mi's (a segment on the ekg called the st segment is noted to be higher than the baseline) but that does not mean a normal ekg can exclude a less severe heart attack.

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Can you see heart attack changes on a 3 lead EKG?

Can you see heart attack changes on a 3 lead EKG?

Well: I'm electrocardiogram there are usually changes that reflect haven't had a heart attack or myocardial infarction. However electrical abnormalities in the conduction system of the heart can't look like a heart attack or infarct. Also some infarcts do not show up on the EKG. Most the time the EKG is abnormal and shows a prior heart attack or while you're having a heart attack itshows the acute changes of a heart attack but it's not 100%

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A major heart attack would always show up on EKG ?

A major heart attack would always show up on EKG ?

Not always: For example, with balanced ischemia, the changes in the ekg for one area are balanced by changes in another. But as a general rule, major mi does have significant changes.

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Would a heart attack usually show up on a 3 lead EKG?

Would a heart attack usually show up on a 3 lead EKG?

It can : A complete ECG is all 12 leads. Having said that a 3 lead ECG can give suspicion to prior injury or infarct, but not confirm for as confidently. Also matters which 3 leads are being traced, contiguous or not so that it would be more or less accurate if it made an anatomic sense.

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Is it normal to have a normal EKG with a heart attack?

Is it normal to have a normal EKG with a heart attack?

Occurs: It happens al the time, that is why cardiac enzymes are measured in the blood. Subendocardial infarcts which are the most common, may present with normal or near normal electrocardiograms. If at the emergency room when the heart attack occurs, cardiac enzymes may still be normal. It takes 4 hours of myocardial death for troponins to begin rising. Clinical suspicion, infarct syndrome, cardiaccath.

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Can you have a normal EKG and still have a heart attack?

Can you have a normal EKG and still have a heart attack?

Yes : Today and until the beginning, and depending on the amount of damage.

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Which tests are recommended after EKG shows heart attack?

Which tests are recommended after EKG shows heart attack?

Depends: We may find surreptitiously in doing ekg that they may be an old heart attack. We work up the heart to find out if there is clogging of arteries or by echo how well the heart is functioning. If it is acute with symptoms and ekg suggestive of heart attack, the person is admitted to the hospital for blood tests and proper treatment by the cardiologist either invasively or by meds.

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Will ekgs and blood work tell if im at risk for a heart attack?

Will ekgs and blood work tell if im at risk for a heart attack?

EKG : Ekg and blood work can tell if on is having a heart attack. Chest pain due to coronary artery disease ( angina) may not be detected with either of these tests. Stress test may be indicated. Again stress test may be falsely negative. Coronary angiography is the gold standard to rule out narrowing of coronary arteries.

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Is it possible to be having a heart attack with a perfectly normal ekg?

Heart attack: You can have a heart attack with a perfectly normal ECG especially very early but if any signifcant amount of heart is involved there should be ECG changes.

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What does a normal EKG look like versus an abnormal one from an undetected heart attack ?

What does a normal EKG look like versus an abnormal one from an undetected heart attack ?

A normal EKG: Because some areas of the heart are electrically silent, one can have a full blown heart attack with an entirely normal ekg. When the ekg is destined to become abnormal, it often lags, not showing changes early on: hence the need for "serial ekgs" (done daily). The adage "treat the patient, not the ekg" hasn't changed over the years.

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Ekg's a week apart show heart attack with thickening on right side of heart. What does this mean?

Abnormal: Ekg shows electrical shifts the damaged-heart attacked muscle signal, is reduced. Q waves or flattening of the ekg trace are seen and commented in the report. Thickening is not a usual comment. That would be seen on an echocardiogram more likely. Ventricular hypertrophy and larger signals can be identified by ekg.

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My ekg said short st.. what's this mean and what causes it? Also does a normal ekg mean I'm not having a heart attack?

My ekg said short st.. what's this mean and what causes it? Also does a normal ekg mean  I'm not having a heart attack?

Pattern between S&T: Waves in EKG. Study: https://goo.gl/RBVB3n. EKGs actually miss most heart attacks because (to be continued).

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Just got EKG-showed heart attack! I'm in good health & exercise a lot.Should I be having some discomfort if I had a heart attack in the past?

Just got EKG-showed heart attack! I'm in good health & exercise a lot.Should I be having some discomfort if I had a heart attack in the past?

Silent MI: A heart attack ( myocardial infarction or MI) sometimes can occur without pain( silent MI). Your doctor can counsel you on maintaining your health and strategy to prevent a recurrence.

Dr. William Singer
3 doctors shared insights

Electrocardiogram (Definition)

Electrocardiogram (ecg, ekg) is a print-out of the electrical forces detected by electrodes on the chest wall, as electricity travels through the heart with each heart beat. The electrodes are placed in different positions, and each position "sees" the electrical activity of the heart from its own vantage point. Abnormalities in signal detected at chest surface ...Read more


Dr. Creighton Wright
3,961 doctors shared insights

Heart Attack (Definition)

A life-threatening condition in which the blood vessels that supply the heart becomes occluded and thus the heart itself is not longer receiving any blood flow. Without this blood flow, the heart muscle dies and cannot pump blood to the ...Read more