1/4. Echocardiographic features, left heart events and the spatial ventricular gradient in a case with intermittent type A wolff-parkinson-white syndrome.In a patient with intermittent type A Wolff-Parkinson-White (WPW) syndrome, the echocardiogram revealed late "double peaked" anterior motions (the former in the late systole, the latter in the early diastole) of left ventricular posterior wall during WPW conduction. In the same condition, phonocardiographic and mechanocardiographic observations indicated a prolonged electromechanical interval, but the external isovolumic contraction time (EICT) and left ventricular ejection time/EICT ratio remained unaltered. In addition, definite but slight alteration in the spatial ventricular gradient was observed. These observations by non-invasive methods present additional informations supporting the concept that conduction abnormalities per se are not responsible for abnormalities of ventricular function unless there is severe underlying heart disease.- - - - - - - - - - ranking = 1keywords = motion (Clic here for more details about this article) |
2/4. Left ventricular posterior wall motion in patients with the wolff-parkinson-white syndrome.echocardiography appears to be a sensitive technique for detecting disturbances in left ventricular posterior wall motion in subjects with WPW type A. The characteristic abnormality consists of premature anterior displacement of the LVPW shortly after the inscription of the delta wave. The ability to detect abnormal wall motion is influenced by the size of the segment of myocardium undergoing pre-excitation, the site of insertion of the anomalous pathway, and its accessibility to echocardiographic study. The results of this study support the concept that WPW type A represents premature excitation of the posterior left ventricular wall in some patients. Moreover, such pre-excitation may be associated with an altered pattern of left ventricular contraction. A similar pattern of LVPW motion was not observed in a large group of randomly selected clinical echocardiograms including a variety of intraventricular conduction disturbances.- - - - - - - - - - ranking = 7keywords = motion (Clic here for more details about this article) |
3/4. echocardiography of ventricular septal movement in wolff-parkinson-white syndrome.Four patients, three with type B wolff-parkinson-white syndrome and right ventricular preexcitation and one with type A wolff-parkinson-white syndrome with left ventricular preexcitation, were studied echocardiographically. One of the patients with type B wolff-parkinson-white syndrome was also studied while in intermittent normal conduction and right ventricular posterior preexcitation. Three patients with right ventricular preexcitation demonstrated early posterior systolic ventricular septal motion shortly after the on set of the delta wave of the QRS complex and later systolic paradoxic ventricular septal motion. During normal conduction in the patient with intermitten right ventricular preexcitation the early systolic posterior septal movement disappeared and the later systolic septal movement became posterior; ventricular septal systolic movement became normal. The type a wolff-parkinson-white syndrome patient demonstrated normal systolic ventricular septal movement while in preexcitation.- - - - - - - - - - ranking = 2keywords = motion (Clic here for more details about this article) |
4/4. Improved cardiac function after catheter ablation in a patient with type B wolff-parkinson-white syndrome with an old myocardial infarction.A 67-year-old man was admitted to hospital for the treatment of exertional dyspnea. He suffered from congestive heart failure due to an old inferior myocardial infarction with type B wolff-parkinson-white syndrome. Asynchronous wall motion caused by pre-excitation through a right-side bypass tract caused his cardiac function to deteriorate. catheter ablation of the bypass tract increased the ejection fraction, and improved his symptoms, prior to surgical revascularization.- - - - - - - - - - ranking = 1keywords = motion (Clic here for more details about this article) |