Search results
Results from the WOW.Com Content Network
Viral cardiomyopathy occurs when viral infections cause myocarditis with a resulting thickening of the myocardium and dilation of the ventricles. These viruses include Coxsackie B and adenovirus, echoviruses, influenza H1N1, Epstein–Barr virus, rubella (German measles virus), varicella (chickenpox virus), mumps, measles, parvoviruses, yellow fever, dengue fever, polio, rabies, and the ...
Myocarditis is most often due to a viral infection. [1] Other causes include bacterial infections, certain medications, toxins and autoimmune disorders. [1] [2] A diagnosis may be supported by an electrocardiogram (ECG), increased troponin, heart MRI, and occasionally a heart biopsy.
A complete blood count may show an elevated white count and a serum C-reactive protein may be elevated. Acute pericarditis is associated with a modest increase in serum creatine kinase MB (CK-MB). [ 5 ] and cardiac troponin I (cTnI), [ 6 ] [ 7 ] both of which are also markers for injury to the muscular layer of the heart.
Strenuous endurance exercise such as marathons or triathlons can lead to increased troponin levels in up to one-third of subjects, but it is not linked to adverse health effects in these competitors. [27] [28] [29] High troponin T levels have also been reported in patients with inflammatory muscle diseases such as polymyositis or dermatomyositis.
The onset of symptoms can occasionally be gradual rather than sudden. [8] The cause of pericarditis often remains unknown but is believed to be most often due to a viral infection. [4] [8] Other causes include bacterial infections such as tuberculosis, uremic pericarditis, heart attack, cancer, autoimmune disorders, and chest trauma.
Differential diagnosis of troponin elevation includes acute infarction, severe pulmonary embolism causing acute right heart overload, heart failure, myocarditis. Troponins can also calculate infarct size but the peak must be measured in the 3rd day. After myocyte injury, troponin is released in 2–4 hours and persists for up to 7 days.
The CPK-MB test (creatine phosphokinase-MB), also known as CK-MB test, is a cardiac marker [3] used to assist diagnoses of an acute myocardial infarction, myocardial ischemia, or myocarditis. It measures the blood level of CK-MB (creatine kinase myocardial band), the bound combination of two variants (isoenzymes CKM and CKB ) of the enzyme ...
A chest radiograph and routine blood tests may indicate complications or precipitating causes and are often performed upon arrival to an emergency department. New regional wall motion abnormalities on an echocardiogram are also suggestive of a myocardial infarction. Echo may be performed in equivocal cases by the on-call cardiologist. [3]