Mitral valve prolapse Diagnosis
Some tests use to diagnosis for Mitral valve prolapse include:
1. X-ray examination: the majority of patients have no obvious abnormal hearts. Severe mitral regurgitation or Mitral valve prolapse have increased left atrium and left ventricle. The most common is abnormal chest bone. Left ventricular angiography showed that mitral valve prolapse and regurgitation, right anterior oblique projection shows mitral valve back lobe into the left atrium at systole; left ventricular systolic asymmetry, basal ventricular have a strong contraction, showing sag changes.
2. ECG: ECG can show normal in most patients. The performance of some patients for Ⅱ, Ⅲ, aVF lead biphasic or inverted T wave, as well as non-specific ST segment changes, the change in the amyl nitrite inhalation or even more evident after exercise. ST-T wave changes may or papillary muscle ischemia, or left ventricle after valve prolapse increased tension and hyperfunction of the sympathetic nerve. QT interval prolongation can be seen. Common variety of arrhythmias, including atrial premature beats, ventricular tachycardia or ventricular tachycardia, sinus node dysfunction and various atrioventricular block.
3. Echocardiography: is the important diagnosis of mitral valve prolapse. Two-dimensional echocardiography on parasternal long axis section shows that back and forth leaves into the left atrium on systolic mitral valve, and over the level of valve ring. In addition, the mitral valve can be seen showing a balloon-like change in valve thickening, long, ring expansion, the expansion of the left atrium and left ventricle, thinning extended tendons or fracture. M-mode ultrasonography showed late systolic mitral valve closure line leaves (CD paragraph) 2mm ultrasonic backward arch and the whole systolic shift ultrasound after 3mm. At the same time, a section of valve systolic or both back and forth valve have hammock-like changes.