What does a Q wave mean on a ekg?

EKG . The ekg has waves with amplitude and direction. A q wave reflects a lack of electrical force in a certain direction. This lack of force has some correlation when a change in pattern with a loss of muscle as is seen in heart damage like a heart attack.
Old infarct. A q wave means an old infarct (a previous heart attack) that resulted in permanent death of a part of the heart muscle. Depending on the location, extent, and other co-morbidities, it may or may not cause new health problems. The q wave appears because the muscle can no longer transmit electrical signals through the heart. An EKG measures the electrical activity of the heart so that's how it looks.

Related Questions

What does a "q-wave" mean on an ekg?

Depends. Q waves if noted on an EKG can indicate an old heart attack or a normal variant. A hypertrophic cardiomyopthy pt can also have q waves. Clinical correlation is required and testing such as an echocardiogram or stress test is needed. Read more...
It depends. Sometimes it can just be a normal variant, sometimes reflects an old heart attack. Your physician can tell you which of the two it is. Read more...