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Biomedical subjects

C S Soo

Publications and source records attributed to C S Soo.

At least 19 recordsLinked to original sources
PubMed1995

Two-dimensional echocardiographic detection of biventricular thrombi.

A 42-year-old man presented with acute myocardial infarction. The ECG on admission to hospital showed "Q wave" inferior myocardial infarction and "non-Q wave" anterior infarction. Subsequently, he was readmitted to hospital on many different occasions for cardiac failure. About 15 months after the patient was first seen, two-dimensional echocardiogram (2D echo) showed dilatation of all 4 cardiac chambers and severe global hypokinesia of the left ventricle. In addition, a large echo dense mass was seen at the apex of the left ventricle and 2 smaller echo dense masses were present at the right ventricular apex. The echocardiographic characteristics of these 3 masses strongly suggest that they represent mural thrombi. Two-dimensional echocardiographic detection of biventricular thrombi has rarely been described in the past. This case together with the previously reported case by Friedman and Buda suggest that 2D echo may be a valuable test for the diagnosis of biventricular thrombi.

Adult↗
PubMed1993

Total occlusion of left main coronary artery in Orientals: profile of 4 cases.

The authors report 4 Oriental cases of total occlusion of the left main coronary artery (LMCA) with differing presentations. The first patient had a twelve-year history of stable angina pectoris. The second patient had angina for a year, which became unstable two months prior to diagnosis. The third patient had myocardial infarction seven years ago and presented with a one-month history of rest angina. The fourth patient had stable effort angina for six years but presented with accelerated angina three months prior to diagnosis. The incidence of total occlusion of the LMCA is rare and survival depends on the existence of collateral circulation. In LMCA disease, there is usually disease in other parts of the coronary arterial tree, and hence, the need for urgent coronary bypass surgery.

Angina Pectoris↗
PubMed1993

Review of patients with infective endocarditis of native valves over a five-year period.

The clinical characteristics, echocardiographic features, bacteriologic data, morbidity and mortality of patients who were admitted to our hospital with infective endocarditis of their native valves over a five-year period were reviewed. There were 32 patients with a mean age of 38.2 +/- 16.2 years (range: 17 to 71 years) in our study population; 24 patients had underlying valvular abnormalities, six patients had congenital heart disease and two patients had no structural cardiac abnormality. Echocardiography was performed for all patients. Vegetations were absent in three (9.4%) patients, single in 19 (59.4%) patients and multiple in ten (31.3%) patients. Of the 24 (75%) patients who had left-sided endocarditis, mitral valve disease was the commonest valvular abnormality (16 patients). Ventricular septal defect was the commonest underlying abnormality in patients with right-sided endocarditis. Blood cultures were positive in 26 (81.3%) patients; the commonest organism was streptococcal (16 or 50% patients). Complications were present in 13 (40.6%) patients, of which eight patients had evidence of embolism, four patients had cardiac failure and one patient had a paravalvular abscess. Four (12.5%) patients died, two as a result of refractory heart failure and two as a consequence of septic embolism. Advances in medicine have resulted in a better outcome for patients with infective endocarditis, however, it remains an important disease with significant morbidity and mortality.

Adolescent↗
PubMed1992

Intravascular hemolysis after mitral valve repair: a word of caution.

The case of a young patient who presented with severe hemolysis after mitral valve repair is presented. Valve repair included chordal shortening, transposition of chordae tendinae, and annular remodelling using a Duran flexible ring. Reoperation and valve replacement were required to control hemolytic anemia. The possible mechanisms leading to such an uncommon complication after plastic repair of the mitral valve are commented on. The scanty literature concerned is reviewed.

Adult↗
PubMed1992

A review of patients with a 'normal' coronary angiogram over a 3-year period.

Over a period of 36 months, we detected 54 patients with normal coronary arteries or non-critical coronary artery stenosis within our study series of coronary angiography. We studied these patients to determine their clinical, electrocardiographic, stress testing and angiocardiographic characteristics. We detected among them a preponderance of female sex and a higher incidence of ethnic Indians. The majority of the patients studied had one or more coronary risk factors. 52% had a normal resting ECG. In those with a positive stress test and reports available for review, there is a near equal distribution of horizontal and J-type ST depression. Those patients with a positive treadmill tend to have a higher left ventricular end diastolic pressure (LVEDP) at cardiac catheterization. We also noted in this group of patients a higher proportion with a small distal left anterior descending artery. These patients also tend to have higher LVEDP even in the presence of normal left ventriculogram. Our current series suggests the possibility of raised left ventricular end-diastolic pressure and the presence of a "small distal left anterior descending artery" syndrome in association with patients with a 'false positive' treadmill test.

Adult↗
PubMed1991

Spontaneous coronary artery dissection in a young man with anterior myocardial infarction.

A case of spontaneous coronary artery dissection in a young male with subsequent myocardial infarction is reported. In addition, distal vessel occlusion is noted, presumably from embolization of thrombotic material originating from the site of dissection. Postulated mechanisms of this uncommon cause of myocardial infarction and subsequent therapeutic options are reviewed.

Adult↗
PubMed1983

Portal-hepatic venous malformation: ultrasound, computed tomographic, and angiographic findings.

A 59-year-old woman was evaluated for a mass in the right lobe of the liver. Ultrasonography (US) demonstrated multiple anechoic areas with enlargement of portal and hepatic veins. These areas were enhanced uniformly after bolus injection of contrast material during computed tomography (CT). The diagnosis of portal-hepatic venous fistula was confirmed by the portal venous phase of a superior mesenteric angiogram.

Angiography↗
PubMed1983

Monitoring hepatic artery spasm for chemotherapeutic infusion by using Tc-99m labeled macroaggregated albumin.

During angiographic placement of an intra-arterial hepatic catheter, a spasm was encountered in the proper hepatic artery. Subsequent angiography, however, revealed normal arteries. Tc-99m MAA intra-arterial infusion was then performed which showed a hepatic artery spasm. Twenty-four hours after the initial hepatic arterial spasm, a repeat injection of Tc-99m MAA revealed that the spasm was no longer present and, therefore, that intra-arterial chemotherapy could be administered.

Adult↗
PubMed1983

Work in progress: transcatheter management of primary carcinoma of the liver.

Twenty-four patients with hepatocellular carcinoma or cholangiocarcinoma were treated with hepatic artery infusion (HAI) of chemotherapeutic agents (14 patients) or hepatic artery embolization (HAE) (11 patients). One patient had a combination of the two treatments. Ten of the 14 (71%) patients who underwent HAI demonstrated partial remission. The median survival time was 12.3 months. Six of the 9 patients (67%) who underwent HAE and for whom follow-up was available responded to treatment. The median survival time for those patients was 17.4 months.

Adenoma, Bile Duct↗
PubMed1983

Treatment of hepatic neoplasm through extrahepatic collaterals.

Twenty-nine patients with hepatic artery occlusion were treated with additional hepatic infusion or embolization through extrahepatic collaterals. Seventeen courses of hepatic infusion were performed in 13 patients through the inferior pancreaticoduodenal artery, left gastric artery, or right gastric artery. Twenty-five hepatic embolization procedures were performed in 16 patients through the right and left phrenic arteries, left and right gastric arteries, pancreaticoduodenal artery, gastroduodenal artery, or omentoepiploic artery. In one patient gastric ulcers developed following left gastric artery infusion. No complication related to the embolization procedure was observed in the embolization group. The extrahepatic collaterals are important alternative routes for continuous transcatheter management of hepatic neoplasms following hepatic artery occlusion.

Adult↗
PubMed1983

Superselective catheterization technique in hepatic angiography.

The techniques for superselective catheterization of hepatic artery are described. The catheters have five major configurations in various sizes: (1) simple curve, (2) reverse curve, (3) double curve, (4) modified double curve, and (5) hepatic and splenic curves. Since the celiac artery may be directed caudad, horizontally, or cephalad, the techniques vary accordingly. The basic approach of the system described is to tailor the catheter to fit the vascular anatomy. These various techniques have produced a 95% success rate in the hepatic artery catheterization of 1,000 patients.

Catheterization↗