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Biomedical subjects

Yasushi Tsutsumi

Publications and source records attributed to Yasushi Tsutsumi.

9 recordsLinked to original sources
PubMed2006

Biventricular pacing 18 months after Batista operation.

We conducted biventricular pacing in a patient with dilated cardiomyopathy and complete left bundle branch block who had recurrent heart failure and mitral valve regurgitation 18 months after partial left ventriculectomy and mitral valve repair. An epicardial lead was fixed on the left ventricular free wall surgically through a thoracotomy, and the other two leads were implanted transvenously. Biventricular pacing restored contractile synchrony and led to more efficient left ventricular contraction and reductions in mitral regurgitation. Biventricular pacing may produce beneficial effects for patients with the recurrent intractable heart failure associated with cardiomyopathy and complete left bundle branch block after partial left ventriculectomy.

Bundle-Branch Block↗
PubMed2005

Colonic stricture secondary to hemolytic uremic syndrome caused by Escherichia coli O-157.

Shiga toxin-producing Escherichia coli (E. coli) is known to be one of the main causes of hemolytic uremic syndrome (HUS). Of the secondary complications of HUS, colonic stricture is relatively rare. We herein report on a Japanese girl that demonstrated sigmoid colon stricture secondary to HUS caused by an infection of E. coli O-157. Severe HUS occurred after the E. coli O-157 infection, so hemodialysis was performed due to renal failure. However, 1 month after recovery from HUS, abdominal symptoms occurred. A contrast study in the colon revealed a sigmoid colon stricture. The stricture was operatively resected. Thereafter, her postoperative course was uneventful. We also review the occurrence of this complication secondary to HUS in the literature.

Child, Preschool↗
PubMed2004

Radionuclide study of mid-term left ventricular function after endoventricular circular patch plasty.

OBJECTIVE: Although the early result of endoventricular circular patch plasty (EVCPP) has been reported, few are seen about the long-term results. We studied left ventricular (LV) function in the early and mid-term periods after EVCPP with electrocardiographic-gated single photon emission computed tomography (Gated SPECT). METHODS: Consecutive 14 patients with LV asynergy after myocardial infarction, who had the EVCPP procedure, were studied by Gated SPECT. Mean age of patients was 67+/-10 years. Gated SPECT images were obtained and LV end-diastolic volume index (EDVI), LV end-systolic volume index (ESVI) and ejection fraction (EF) were studied with QGS(+) program. Gated SPECT study was performed before surgery, early (23 days) and mid-term periods (32 months) after surgery. RESULTS: EDVI changed significantly from preoperative value to early postoperative value (107+/-39 to 72+/-37 ml/m(2), P < 0.01). There was no significant difference between early and mid-term postoperative values. ESVI also changed significantly from preoperative value to early postoperative value, and from early value to mid-term postoperative value (78+/-37 to 51+/-34 to 47+/-35 ml/m(2), P < 0.05, respectively). EF increased significantly from preoperative value to early postoperative value, and from early value to mid-term postoperative value (30+/-10 to 35+/-13 to 45+/-18%, P < 0.05, respectively). CONCLUSIONS: Direct influence of EVCPP brought significant improvement of LV function in early period. Further decrease of ESVI and increase of EF were noticed from early period to mid-term period. This result suggest that the effect of EVCPP sustains long and yields reverse LV remodeling.

Aged↗
PubMed2002

Angiographic evaluation of the luminal changes in the radial artery graft in coronary artery bypass surgery: a concern over the long-term patency.

OBJECTIVE: The radial artery graft (RA) still involves two unsolved problems, namely, vasospasm and intimal hyperplasia, although satisfactory early and mid-term outcomes have been obtained recently. METHODS: Two hundred patients underwent coronary artery bypass surgery with RA between October,1996 and December,2000. We made a comparison of the luminal diameters at early and mid-term periods in 23 patients who underwent mid-term angiographies after a mean follow-up of 27 months. The proximal anastomoses of the RA were the ascending aorta in these patients. The G/N ratio was determined as a ratio of the luminal diameter of the graft to that of the revascularized coronary artery so as to evaluate the luminal discrepancy between the graft and the native artery. RESULTS: In the 122 patients who underwent angiographies about one month after the operation, the patency rate was 99% (144 of 145) in the RA, 97% (139 of 143) in the left internal thoracic artery graft (LITA), 96% (75 of 78) in the saphenous vein graft (SV). In the 23 patients who underwent mid-term angiographies, the patency rate was 91% (24 of 26) in the RA, 100% (23 of 23) in the LITA, and 83% (20 of 24) in the SV. The luminal diameters of the RA and LITA significantly increased from 2.15 to 2.52 mm, and from 1.75 to 1.97 mm, respectively. The luminal change from 3.78 to 3.33 mm in the SV was not significant. The G/N ratios changed from 1.10 to 1.31, from 1.01 to 1.13, and from 2.05 to 1.86 in the RA, LITA, and SV, respectively. The change of the RA alone was statistically significant. CONCLUSIONS: The angiographic early patency rate was almost the same in three kinds of graft material, but the mid-term patency rate of the RA was between those of the LITA and SV. The mid-term luminal dilatation of the RA could involve two conflicting characteristics, namely, a good intimal function and a propensity to increase in the luminal discrepancy. Therefore, a further observation is required to evaluate whether the clinical outcome of the RA could remain as good as that of the LITA in the long-term period.

Aged↗
PubMed2002

Open heart surgery for posttraumatic inferior vena caval thrombosis.

A 40-year-old woman was diagnosed as intrahepatic hematoma after blunt abdominal trauma. One month later computed tomography (CT) revealed the inferior vena caval thrombus extending into the right atrium. Emergency thrombectomy was performed under cardiopulmonary bypass. We believe that the thrombus, which was derived from laceration of the hepatic vein, extended through the inferior vena cava into the right atrium, and was the eve of pulmonary embolization. CT study should be repeated, once the intrahepatic hematoma was recognized. We emphasize that we should recognize the existence of such complication to prevent the catastrophic result.

Abdominal Injuries↗
PubMed2002

Endoventricular circular patch plasty with aortic valve replacement for post-infarction cardiac rupture complicated with aortic valve stenosis: case report.

Cardiac rupture after acute myocardial infarction (AMI) in patients with aortic valve stenosis (AS) is uncommon and only 2 survival cases after surgery have been reported to date. The present patient, a 69-year-old woman with aortic valve stenosis (AS), suffered an acute myocardial infarction and despite a successful baloon angioplasty to the proximal left anterior descending artery, the condition progressed into congestive heart failure. Echocardiography demonstrated AS with a valve area of 0.7 cm2 and a left ventricular aneurysm with a thin and dyskinetic anterior to apical wall. An urgent operation was performed and the opening of the pericardium revealed oozing rupture of the aneurysm. An endoventricular circular patch plasty combined with aortic valve replacement was successfully performed, and good results during 2-year follow-up were achieved. Physiological repair with exclusion of the infarcted area is essential to achieve a good long-term outcome in such a critical case. Special care should be taken with AMI in a patient with AS because of the possible occurrence of aneurysm and rupture of the left ventricle.

Aged↗
PubMedDate not supplied

Comparison of volume study by left ventriculography and gated SPECT in endoventricular circular patchplasty.

Although quantitative gated SPECT (QGS) is widely used for left ventricular (LV) volume study, its accuracy is not established for those who have a large myocardial infarction scar or who had endoventricular circular patch plasty (EVCPP). Therefore, we compared LV volumes and LVEF calculated by QGS and those calculated by left ventriculography (LVG) before and after EVCPP. Sixteen patients (13 men and 3 women, mean age 67 +/- 9.5 years) were treated with EVCPP for postinfarction LV dyskinetic and/or akinetic scar. All patients were evaluated with both QGS and LVG before and after surgery. QGS was performed using eight frames per cardiac cycle, 1 hour after 740 MBq (99 m)Tc-tetrofosimin was administered. LVG images were acquired at a frame rate of 30 frames per second in the right anterior oblique 30-degree projection. We compared LV end-diastolic volume (LVEDV), LV end-systolic volume (LVESV), and LV ejection fraction (LVEF) between QGS and LVG. There was an excellent linear correlation between QGS and LVG in LVEDV (preoperative; r = 0.87, postoperative; r = 0.94), LVESV (preoperative; r = 0.95, postoperative; r = 0.89), and LVEF (preoperative; r = 0.73, postoperative; r = 0.81) before and after EVCPP. However, both preoperative LV volumes and postoperative LVEF calculated from QGS gave a smaller value than those calculated from LVG. Postoperative volume data by QGS was much close to LVG. The present study indicated that volume study by QGS is very useful to evaluate the LV function after EVCPP. However, we should pay attention to those facts.

Aged↗
PubMedDate not supplied

Surgical treatment of multiple coronary artery fistulas with an associated small saccular aneurysm--a case report.

Coronary angiography (CAG) of a 57-year-old woman with anterior chest discomfort revealed no stenosis of the coronary arteries but multiple coronary artery fistulas (CAFs). The sites of origin for the CAFs were the right coronary artery, left main coronary artery, left anterior descending coronary artery, and ascending aorta. The only site for drainage was the main pulmonary artery. Furthermore, a small saccular aneurysmal formation was detected. Surgical treatment was considered better than conservative treatment or coil embolization, and ligation and division of the CAFs were performed during cardiopulmonary bypass. Using a Harmonic Scalpel to expose fistulous arteries was very effective. CAG performed immediately after surgery demonstrated that all CAFs were repaired. The postoperative course was uneventful.

Aorta↗