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T Owaki

Publications and source records attributed to T Owaki.

At least 37 records · Page 2Linked to original sources
PubMed1981

[Cross-sectional and M-mode echocardiographic diagnosis of vegetative endocarditis in the right-sided heart (author's transl)].

M-mode and cross-sectional echocardiograms of 3 cases with vegetative endocarditis in the right-sided heart were reported. The location of vegetative lesions was the tricuspid valve in one, the parietal band of the right ventricle and chordae tendinae in one, and the pulmonary artery wall in the remaining patient. Ruptured chordae tendinae were observed in the patient with tricuspid valve vegetation. M-mode echocardiography detected vegetative lesions in all patients. However, the precise size and location of these lesions, and a complication of the destructive process were not evaluated by M-mode echocardiography. On the other hand, cross-sectional echocardiography not only documented the presence but also assessed the morphologic characteristics of the lesions, since this technique provides spatial orientation concerning moving structures. Furthermore, ruptured chordae tendineae in the patient with tricuspid valve vegetation was correctly estimated. However, the lesions should be differentiated from other conditions including a localized calcified lesion, abscess and thrombus. In conclusion, cross-sectional echocardiography in combination with M-mode echocardiography is recommended in diagnosing vegetative lesions in the right-sided heart.

Adolescent↗
PubMed1979

Cross-sectional echocardiographic diagnosis of coronary artery aneurysms in patients with the mucocutaneous lymph node syndrome.

Real-time cross-sectional echocardiographic studies revealed the presence of coronary artery aneurysms in five patients with mucocutaneous lymph node syndrome. These lesions appeared as circular echo-free spaces with clearly-defined borders in sites corresponding to angiographically proven aneurysms. In 15 normal subjects who were studied only by noninvasive methods, and in 17 who had normal coronary arteriograms (including eight with the mucocutaneous lymph node syndrome), we found no similar echo findings. The aneurysms were in both right and left coronary arteries in three patients, and were confined to the left side in two. The mucocutaneous lymph node syndrome is an increasingly common condition in Japan which may be fatal due to myocardial infarction occurring in a setting of coronary aneurysm with thrombosis. Therefore, the ability to demonstrate coronary aneurysms noninvasively is of prognostic and potentially therapeutic value in this inadequately understood syndrome.

Adult↗
PubMed1979

Noninvasive diagnosis of pseudoaneurysm of the left ventricle.

The echocardiographic, scintigraphic, angiocardiographic and autopsy correlations in a patient with left ventricular pseudoaneurysm are presented. Interruption of the echo of the left ventricular wall and radioisotope image of pseudoaneurysm and its communication channel are demonstrated for the first time. The striking similarity of the radioisotope image to the angiographic image is noted. This study suggests that echocardiography has capability to visualize left ventricular wall defects, such as the perforation seen in this case and radioisotope ventriculography is equivalent to the invasive contrast technique. Both of the methods seem to be safe and specific for the diagnosis of left ventricular pseudoaneurysm.

Aged↗
PubMed1978

Cross-sectional echocardiographic diagnosis of large left atrial tumor and extracardiac tumor compressing the left atrium. Limitation of M mode echocardiography in distinguishing the two lesions.

A case of a left atrial fibrosarcoma arising from the posterior left atrial wall and two cases of an extracardiac tumor compressing the left atrium were studied with M mode and cross-sectional echocardiography. In all three cases, M mode echocardiography revealed a mass of echoes just behind the aorta and did not distinguish a left atrial from an extracardiac tumor. By contrast, cross-sectional echocardiography allowed direct visualization of the location, size and movement of the tumor in all three cases and contributed to distinguishing the two lesions. This study indicates that cross-sectional echocardiography is more accurate than M mode echocardiography in the differential diagnosis of a large left atrial tumor and extracardiac tumor compressing the left atrium.

Adult↗
PubMed1978

Ultrasonic features of anomalous origin of the left coronary artery from the pulmonary artery.

Two cases of anomalous origin of the left coronary artery from the pulmonary artery with and without marked dilatation of the right coronary artery were studied by M-mode echocardiography and cross-sectional echocardiography. The M-mode echocardiogram obtained from the case with the dilated right coronary artery demonstrated an abnormal structure anterior to the aortic root. The cross-sectional echocardiogram of the same case visualized the origin of the dilated right coronary artery. In addition, echocardiographic abnormalities suggesting the ischemia of the left ventricle were observed in both cases. Although many of the ultrasonic features are nonspecific, the combination of ultrasonic technique provides useful clues to the diagnosis of anomalous origin of the left coronary artery from the pulmonary artery.

Adult↗
PubMed1978

Echocardiographic features of congenital pulmonary regurgitation.

Eight patients with congenital pulmonary regurgitation documented by cardiac catheterization and angiography were studied by echocardiography. Echocardiographic features of the pulmonary valve observed in this condition included a) diastolic fluttering (5 cases), b) diastolic separation (2 cases), and c) increase of posterior motion during atrial systole (a wave). Maximum a wave depth exceeded the upper limit of the normal value in 2 cases and averaged 6.1 +/- 0.7 (standard error of the mean) mm. In addition, d) diastolic fluttering of the anterior tricuspid valve was seen in 5 cases and e) abnormal interventricular septal motion in 2 cases (one, paradoxical and the other, flat). Of these findings, the diastolic fluttering of the pulmonary valve, which results from the turbulent stream of blood in the outflow of the right ventricle striking the pulmonary valve, is pathognomonic for pulmonary regurgitation. Although the other findings are nonspecific, all patients had at least 1 of these 5 findings. Echocardiography, therefore, provides useful clues to the diagnosis of pulmonary regurgitation. Furthermore, echocardiography should be of use in differentiating congenital from functional pulmonary regurgitation and from aortic regurgitation.

Adolescent↗
PubMed1977

Reappraisal of jugular phlebogram in the diagnosis of tricuspid regurgitation. Relationship between echocardiographic interventricular septal motion and jugular phlebogram.

Little information is available concerning the relationship between the pattern of the jugular phlebogram and interventricular septal motion. We studied 250 patients with various conditons. Abnormal septal motion was observed in only 33% of the patients with tricuspid regurgitation. All the patients having abnormal septal motion and 66% of those having normal septal motion had the jugular pattern of tricuspid regurgitation. After cardiac operation with the incision of cardiac chambers and pericardiotomy, abnormal septal motion was seen from 40 to 89% at early postoperative period. Of the patients studied approximately 1 year after operation, there was reduced incidence of septal abnormality. Septal motion was normal in all the patients who had ligation of a patent ductus arteriosus and who underwent Blalock's operation. Of these, all having paradoxical motion which occurred in the mid-septum at least had the jugular pattern of tricuspid regurgitation. On the other hand, only 20 to 30% of the patients whose septal motion was normal had the jugular pattern of tricuspid regurgitation. Furthermore, all of the 3 patients with coronary artery disease having paradoxical motion of the entire septum had the jugular pattern of tricuspid regurgitation, as well. We conclude that the jugular pattern of tricuspid regurgitation and echocardiographic septal motion abnormality are related to each other and that tricuspid regurgitation should not be diagnosed by jugular phlebogram unless echocardiographic septal motion is examined.

Adolescent↗