The high-sensitive troponin test can help diagnose heart conditions such as obstructive coronary disease (CAD), stable angina, congestive heart failure, cardiomyopathy, chronic heart failure, myocarditis, aortic dissection, cardiotoxic chemotherapy, blunt trauma to the chest, and strenuous exercise, for example, endurance athletes. If troponin levels are elevated high and the ECG (EKG, electrocardiogram) indicates an acute heart attack, immediate cardiac intervention such as catheterization, stents, or a coronary artery bypass graft (CABG). (There are three types of cardiac troponin proteins, I, T, and C.), which helps doctors diagnose a heart attack more quickly. The high-sensitive troponin test can detect very low levels of troponin T in the blood. Furthermore, a patient with heart symptoms can frequently require additional evaluation and testing. The reasons for this are largely unknown, but it is important to remember that a normal EKG does not necessarily preclude the possibility of underlying heart disease. In some instances, the EKG may be entirely normal despite the presence of an underlying cardiac condition that normally would be reflected in the EKG.These conditions can often be sorted out by a physician with a detailed examination, and occasionally other cardiac tests (for example, echocardiogram, exercise stress test). They may even be a normal variant and not reflect any abnormality at all. Many abnormal patterns on an EKG may be nonspecific, meaning that they may be observed with a variety of different conditions.In such instances, the EKG as recorded during an exercise stress test may reflect an underlying abnormality while the EKG taken at rest may be normal. This patient may have an entirely normal EKG at a time when he or she is not experiencing any symptoms. The most common example of this is in a patient with a history of intermittent chest pain due to severe underlying coronary artery disease. The EKG is a static picture and may not reflect severe underlying heart problems at a time when the patient is not having any symptoms.What are the limitations of the ECG (EKG)? Evidence of inflammation of the heart or its lining ( myocarditis, pericarditis).Evidence of abnormal blood electrolytes (potassium, calcium, magnesium).Adverse effects on the heart from certain lung conditions (such as emphysema, pulmonary embolus ).Adverse effects on the heart from various heart diseases or systemic diseases (such as high blood pressure, thyroid conditions, etc.).Evidence of an acute impairment to blood flow to the heart during an episode of a threatened heart attack (unstable angina).Evidence of an evolving, acute heart attack.Evidence of the occurrence of a prior heart attack ( myocardial infarction).Abnormal conduction of cardiac impulses, which may suggest underlying cardiac or metabolic disorders.Abnormally fast or irregular heart rhythms.Patterns of abnormal electric activity that may predispose the patient to abnormal cardiac rhythm disturbances.Evidence of acutely impaired blood flow to the heart muscle.Evidence of damage to the various parts of the heart muscle.Evidence of increased thickness (hypertrophy) of the heart muscle.
The orientation of the heart (how it is placed) in the chest cavity.The underlying rate and rhythm mechanism of the heart.
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