Transthoracic and Transesophageal Echocardiography in the Diagnosis and Surgical Management of Right Atrial Myxoma

Effect of Dobutamine on Signal-Averaged Electrocardiogram of Patients with Suspected Coronary Artery Disease

“…DTDE can provide useful information about possible satellite lesions, the origin and extension through the fossa ovalis and the severity of mitral involvement and risk of emboli zation. In addition it provides useful information about the intraoperative situation which can be expected with regard to the necessity of repair of the tricuspid or mitral anulus, and information on the integrity of the atrial patch [1,2], In most of the patients, echocardiography may eliminate the need for left heart catheterization and its attendant risks, which include myxoma disruption and subsequent systemic embolization. preoperative diagnosis of mitral valve diseases, to help with the decision about replacement or reconstruction in the mitral valve prolapse syndrome, mitral valve stenosis planning of operative procedures.…”

“…The following quantitative SAECG variables were calcu lated by computer and visually inspected. (1) The total duration of [3][4][5]. This may possibly explain the efficacy of ß-adrenerthe signal-averaged QRS complex (QRSD); (2) the root mean square gic blocking agents in reducing mortality, including sud-…”

“…Four studies were ex cluded because of poor technical quality and 5 patients with abnor mal baseline SAECG were excluded from the study leaving a total of 22 patients who comprised the study population. The characteristics of these patients are shown in table 1. Late potentials noted on the signal-averaged electro cardiogram (SAECG) have been associated with the fu ture development of malignant ventricular arrhythmias [1,2]. Ventricular arrhythmias, including ventricular tachycardia and ventricular fibrillation, are often noted in situations associated with high blood catecholamine lev els [3][4][5].…”

“…Atrial myxomas compose 30-50% of most patho logic series with right atrial myxomas accounting for less than one quarter of these. Approximately 10% of all myx omas have multiple locations and some involve the valvu lar and subvalvular apparatus [1][2][3][4], Surgical removal is routinely recommended due to the potential embolic phe nomena [1,4]. Some authors de vide the myxomas into two types: 'lobular-type' and 'round-type' myxomas [2], The diagnosis of cardiac tumors may be suggested by clin ical and physical findings, in some cases systolic murmur is the only suggestion of a heart tumor.…”

“…Some authors de vide the myxomas into two types: 'lobular-type' and 'round-type' myxomas [2], The diagnosis of cardiac tumors may be suggested by clin ical and physical findings, in some cases systolic murmur is the only suggestion of a heart tumor. Complications include embolization, cyst and microabscess formation, syncope, and sudden death [1][2][3][4]. Transesophageal echo cardiography has been used for assessment and diagnosis of left atrial myxomas.…”