Heart attack and heart enzymes?

Is it possible to have had a heart attack and the person's heart enzymes of the blood test not show up?

Yes, it happened to me. The blood tests they performed and the EKG's showed no evidence that I had experienced a heart attack on the day it happened.

It wasn't until to weeks later when I went to get a stress test performed that there was evidence that I had heart damage from a heart attack.

Let's just set the record straight too, any heart attack regardless of how "minor" it is can eventually be a killer.

It's unlikely unless it's a very minor heart attack. Within 2 hours of a heart attack the Myoglobin level will increase with CKMB increasing up to 4 hours later and Troponin increasing within 6 - 8 hours. If there is muscle damage then the Myoglobin and total CPK can be unreliable, but the CKMB and Troponin are specific to cardiac damage. If a patient is admitted with chest pain then these tests are often repeated every 6 - 8 hours to monitor for changes. Usually EKG's are done as well.

Best Wishes! :)

Yes, I believe so. Depends on severity of the heart attack, how soon after the heart attack the tests were done, etc. If you suspect a heart attack, seek treatment at once. If you're blown off by med staff, but still feel something's wrong, follow your gut instinct and insist on further help. Better safe than sorry.

Yes and No, enzymes are measured over time, as the hours pass the body puts off more enzymes - they are like little allerts to your body to send the helpers to the damaged muscle. If the blood draw is within 15 to 20 minutes of the heart attack they could be negative, but any MD knows that you always run a series of enzyme tests usually the first right away, the second in 2-4 hours and the last in 12 hours, then if any come back positive they run a differential which tells them what muscle is damaged, heart, diaphragm, extremity muscles, ect. The most important test is the EKG, and an ECHO to determine a heart attack and what part of the heart is effected.
Hope this helps

The cardiac enzyme panel is used when an acute myocardial infarction or heart attack is suspected. Most institutions test for the following:

* Total Creatine Kinase (CK)
* Creatine Kinase (MB)
* LDH
* Troponin

Troponin is now the gold standard for the diagnosis of myocardial infarction. A consensus document authored by a joint committee of the European Society of Cardiology (ESC) and the American College of Cardiology (ACC) has redefined a myocardial infarction (MI) as any amount of myocardial necrosis as indicated by an elevation of troponin in the setting of clinical ischemia. It is a "maximal concentration of troponin T or I exceeding the decision limit (99th percentile of the values for a reference control group) on at least one occasion during the first 24 hours after the index clinical event".
NO, it's impossible to have heart attack , and the cardiac enzymes are not elevated.

Yes. In the first 24hrs, enzymes may not go up.