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Biomedical subjects

K Suma

Publications and source records attributed to K Suma.

At least 37 records · Page 2Linked to original sources
PubMed1990

[A case of a patient with the non-confluent main pulmonary artery with the left pulmonary artery after a left Blalock-Taussig shunt for tetralogy of Fallot, which underwent a successful two staged radical repair].

We report on a 14-year-old girl with tetralogy of Fallot and the non-confluent main pulmonary artery with the left pulmonary artery after a left Blalock-Taussig shunt. She underwent a left-sided classic Blalock-Taussig shunt at the age of one. However, she showed repeated dyspnea and increasing cyanosis, and cardioangiography showed the non-confluent main pulmonary artery with the left pulmonary artery. Corrective surgery of tetralogy of Fallot was done by a two-staged operation. In the first stage, a EPTFE prosthesis was grafted between the main pulmonary artery and the left pulmonary artery, and in the second stage, intracardiac operation was performed. The late postoperative status and hemodynamic results were satisfactory and we emphasize the rational for this approach.

Adolescent↗
PubMed1990

[Ruptured aneurysms of sinus of Valsalva with bicuspid aortic valve--a case report of an aged patient (72 years old)].

A 72-year-old man with ruptured aneurysms of the sinus of Valsalva and a bicuspid aortic valve was operated. Ruptured aneurysms were found in the noncoronary sinus region, and they were opened to the commissure between the anterior cusp and septal cusp of the tricuspid valve. The tissue around the aneurysm was very weak, so closure of the ruptured hole was carried out from the inside of both aorta and right atrium. Ruptured aneurysm of Valsalva is very rare in a aged patient. In this case, it is considered that the bicuspid aortic valve associated with malformations of the aortic cusp caused a weakness of the sinus wall, and this region gradually became aneurysmal.

Aged↗
PubMed1989

Postoperative core-temperature rhythm of patients who underwent cardiac surgery.

Core-temperature rhythms of 16 patients who underwent cardiac surgery were studied and tow types of rhythm pattern were recognized. One showed a non-stationary part in the rhythm whereas the other did not. The non-stationary part of the rhythm was thought to be an expression of the disturbance caused by surgical intervention. Patients who suffered from 'ICU syndrome' showed a low-amplitude rhythm.

Adult↗
PubMed1989

[Assessment of sensing parameters in the rate responsive cardiac pacemaker].

Rate responsive cardiac pacemakers in which pacing rate is adjusted by hemodynamic and metabolic demands have been developed in recent years. Although different parameters such as body activity, QT interval, respiration rate, body temperature are used to presume metabolic demand, it is suspected that no single parameter can provide accurate estimate of metabolic demand, and hence rate responsive pacemaker by combined parameters is proposed. This study is aimed to investigate physiological parameters during exercise so as to obtain reliable pacing control algorithm. Twenty healthy volunteers were assessed by a traded treadmill exercise according to the Bruce protocol, and hart rate, QT interval, body temperatures (forehead deep body temperature, rectal, tympanic, oral and axillary temperatures) and respiration rate were monitored. The results showed that correlation coefficient between heart rate and QT interval was 0.979, and that between hart rate and respiration rate was 0.969. Hysteresis was observed when these parameters were plotted against hart rate through a whole exercise protocol.

Body Temperature↗
PubMed1988

[Risk scores for ventricular premature contraction and exercise--performance after repair of tetralogy of Fallot].

Thirty-five patients with tetralogy of Fallot (TF), were studied for the postoperative factors which might have some effect on the presence and severity of ventricular premature contraction (VPC) and exercise performance (EP). Using the factors, we tried to make VPC- and EP-scores. Of the 35 patients, 12 (34%) showed VPCs of Lown's grade 2 or higher (group B) and 23 (66%) were free from significant VPCs (group A). Group B patients were found to have significantly higher postoperative right to left ventricular peak systolic pressure ratios (RV/LV) and higher right ventricular peak systolic pressures (RVP) than those of group A. The right ventricular regional wall motion (RVRWM) in the right ventricular outflow tracts of group B patients showed akinetic or paradoxical movements. VPC-scores using RV/LV, RVP and RVRWM showed that 11 patients, whose score were 0, were free from significant VPCs and showed that 6 of 7 patients (86%), whose score were 3, demonstrated significant VPCs. It was shown that RV/LV, left ventricular ejection fraction (LVEF), CTR and pulmonary regurgitation (PR) affected the exercise tolerance. In the case of EP-scores, using RV/LV, LVEF, CTR and PR, the endurance times of the patients who had higher scores seemed to be shorter. VPC- and EP-scores as a tool for predicting the presence of VPCs and the level of exercise performance seem to be quite useful.

Adolescent↗
PubMed1987

Postoperative deep body temperature rhythm.

The postoperative deep body temperature rhythms of fifteen patients who received aorto-coronary bypass surgery (group I), and of seven patients who received non-cardiac major surgery (group II), were studied. Postoperative patients, especially those who received aortocoronary bypass surgery, showed greatly disturbed deep body temperature rhythm. There existed infradian and ultradian rhythm in both groups, and there existed two patients in group I who did not show sinusoidal rhythm. The patients of group I also showed a longer period of rhythm than did those of group II. The mesor and amplitude of the patients in group I showed a greater individual variation than did those in group II. The acrophase of both groups deviated widely. The patients who underwent cardiac surgery needed a longer time for temperature rhythm recovery than did those who underwent general surgery.

Adult↗
PubMed1987

[Risk factors in the surgical repair of tetralogy of Fallot: analysis of preoperative factors by stepwise regression].

Fifty-one patients undergoing total repair of tetralogy of Fallot between November 1977 and June 1985 were analyzed with respect to determinants of operative mortality and postoperative right to left ventricular peak systolic pressure ratio (RV/LV). The risk factors were age, sex (Sex), previous shunting operation (Shunt), extent of right ventricular outflow tract patch (Patch), various PA-indexes, maximal left atrial volume/BSA (LA/BSA), left ventricular end diastolic volume index (LVEDVI), LVEDVI/normal-LVEDVI, RV/LV, Hb, BSA and weight. Univariate analysis indicated that RV/LV and LA/BSA were associated with operative death. A model for operative mortality with three variables emerged from the multiple stepwise regression analysis: Patch, Shunt and Sex (R = 0.421, R2 = 0.177, F = 3.37). A model for predicted RV/LV with five variables: Weight, Shunt, BSA, Patch and Sex (R = 0.602, R2 = 0.363, F = 5.12). However, it was thought difficult to predict operative mortality and postoperative RV/LV by the preoperative variables. Intra- and postoperative factors might have larger influences on operative mortality and RV/LV than the preoperative ones.

Analysis of Variance↗