How does an electrocardiogram work to figure out heart disease?

EKG. Ekg tells us the electrical activity from various ares of the heart. From that we can tel if there is heart block, slow or fast heart beats, or previous heart attacks.

Related Questions

What other work up should I do to really ruled out heart disease I've done 2decho doppler, 12 lead ecg, ecg, threadmill stress test all came back normal?

Calcium score. It would be extremely unlikely that you have coronary artery disease after your extensive work up. Consider getting a calcium score which is a quick noninvasive cat scan of the heart area looking for calcium plaques. Having a low score is extremely predictive of not having a coronary event in the next five years. Read more...
Tests. You've had more than enough testing. If you're concerned about your heart disease future. Use a mediterranean or vegetarian diet and get regular daily aerobic and some weight exercise. Keep your high BP controlled to normal and be sure your blood sugar and lipids are controlled. You're fine now doing those things will help keep it that way. Read more...

I smoke and my chest xray stress EKG and blood work were all normal. I am happy, I am just curious how I have no smoke in lungs or heart disease.

Not in the clear. You have high blood pressure and that may be, in part, due to your smoking. Smoking causes a lot of other disorders, in addition to heart disease and lung cancer. By continuing to smoke you are playing Russian Roulette. Quit while you are ahead! Read more...
Don't get fooled. Chest x-ray is not the diagnostic tool for COPD. Plaques in blood vessels can grow inward &rupture suddenly at the surface causing clot & sudden heart attack.Normal stress test 1day, heart attack the next. A smoking woman is 6 times more likely to have a heart attack than non-smoking woman. Quitting smoking NOW would reduce your chance of dying in 15 years by 50% - & live HEALTHIER longer! Read more...

All blood work normal EKG stress test chest X-ray all normal, but I am taking blood pressure med. If no heart disease am I still at risk for heart att?

Yes, we all are. We are all at risk for heart attacks. The risk factors addressed in the website given below affect the chances of disease, but lack of all of these risk factors does not reduce the likelihood of heart attack to zero. Maintaining a healthy life style reduces the risk. http://www.mayoclinic.org/diseases-conditions/heart-attack/basics/risk-factors/con-20019520. Read more...

On average, what percentage of heart disease can an electrocardiogram detect on its own?

I don't think .. .... a specific percentage is known, but a resting electrocardiogram is often normal even when some form heart disease is present. It very occasionally reveals that a person has had a heart attack, but didn't know it. It detects a heart attack in progress. It can detect heart rhythm problems some of which may be associated with a heart disease. Other tests (stress tests and echo) are often needed. Read more...
ECG. The ECG is neither highly sensitive nor highly specific overall. It is the important test in identifying rhythm disorders, very helpful in ischemic and hypertrophic heart disease and less so in some others. There is such a large spectrum of diseases that I don't think an accurate estimation can be put forward. Read more...

A recent electrocardiogram revealed an enlarged left atrium. I'm only 25 but heart disease runs in my family. How serious of a condition is this?

Something to watch. Left atrial enlargement may be associated with some risk for future cardiovascular problems including atrial fibrillation (a rhythm problem) and possibly stroke. It also may suggest diastolic dysfunction (strain of the heart at rest). But all of these are conditions associated with aging and the risk of atrial enlargement found in young life may be different. Find a good cardiologist to work with! Read more...
Depends. There are 2 question: is the atrium truly enlarged and, if so, is there a reason for it: both can be answered with an echocardiogram. Usual reasons for left atrial enlargement are: hypertension, left ventricular diastolic dysfunction, atrial fibrillation, mitral valve disease, and atrial septal defect. The EKG is very indirect. The echo is much more accurate as it directly measures LA size. Read more...

Could an EKG always tell if a person has heart disease?

Yes. Ecgs are extremely useful, when correctly read, in suspecting or diagnosing a variety of heart diseases. They can also be falsely normal (false negative) or falsely abnormal (false positive). The inventor was awarded the nobel prize in medicine! Read more...

What is the importance of ECG to diagnose every heart disease?

Primary yardstick. This is the starting place. There are more definitive metrics such as echo-cardiogram;however let's do the basics first. Read more...
Ecg. The ECG is diagnostic for cardiac rhythm, it is indicative of other things. After history and physical exam it is one of the first basic tests we use. Other tests are more informative for things other than rhythm. Read more...
It can't . It can give us valuable clues but if it did everything there would be no other tests. Read more...

What is the importance of an ECG to diagnose my heart disease?

ECG. ECG is a basic test in cardiac diagnosis. If your cardiac problem is arrhythmia, the ECG is crucial/essential. Because of the complex nature of heart disease, we want an ECG on everybody as part of their cardiac evaluation. Read more...