Diffuse myocardial infarction caused by isolated bilateral coronary ostial stenoses in a young woman: report of a case.

A young Japanese woman who appeared to be free from any coronary risk factors was admitted to a local hospital with chest pain. Serological tests showed no evidence of inflammation; however, an electrocardiogram revealed diffuse myocardial ischemia and a coronary angiogram demonstrated isolated bilateral coronary ostial stenoses. Moreover, her serum creatine phosphokinase level was high. On the day following admission, the patient developed severe cardiogenic shock, and she was transferred to our hospital where emergency coronary artery bypass grafting with the saphenous veins was performed using retrograde tepid blood cardioplegia. Recovery of cardiac function was immediate and her postoperative course was uneventful. We suspect that fibromuscular dysplasia was the most likely cause of the ostial stenoses in this patient.

[Emergency coronary artery bypass grafting in elderly patients].

Emergency coronary artery bypass grafting (CABG) in elderly patients still remains to be a therapeutic challenge for cardiac surgeons. The purpose of this study was to review the operative results of our emergency CABG in elderly patients and evaluate it's problems comparing with younger patients. Consecutive forty-three patients underwent emergency CABG for the past ten years were divided into two groups, that is 13 patients aged 75 years or older (group 1) and 30 younger than 75 years old (group 2). There were three in-hospital deaths (mortality rate: 23.1%) in group 1 and three (10.0%) in group 2. The lowest postoperative Ccr (19.1 +/- 8.9 ml/ min) in group 1 was significantly lower (p < 0.02) than that (35.6 +/- 14.4 ml/min) in group 2. Respiratory Index on the first postoperative day, which indicates lung dysfunction when it comes up to 2.0 or more, showed 2.65 in mean value in group 1 compared with 1.31 in group 2 (p < 0.05). Severe infections like sepsis were developed in 4 patients (30.8%) in group 1 and 2 (6.7%) in group 2 (p < 0.05). In conclusion, it was clearly suggested that kidney protection by earlier myocardial revascularization, prevention of severe infection and earlier introduction of respiratory physiotherapy in the postoperative period were advisable to improve the operative results of emergency CABG in elderly patients.

[Experiences of reoperative coronary artery bypass grafting by left thoracotomy without aortic clamping].

We reported two cases which had reoperative coronary artery bypass grafting (CABG) through the left thoracotomy approach without aortic clamping with good results. Case 1. A 50-year-old man, who underwent a double CABG to left anterior descending coronary artery (LAD) and right coronary artery (RCA) in 1983, had a recurrent unstable angina due to new significant stenosis of the diagonal branch (DG) and obtuse marginal branch (OM) in 1989. He was reoperated upon, having a new double CABG to DG and OM through the left thoracotomy using hypothermic ventricular fibrillation without aortic clamping for the myocardial protection without any blood transfusion. Case 2. A 61-year-old man, who underwent a double CABG to LAD and RCA in 1982, had a recurrent unstable angina and a left ventricular aneurysm in 1991. He had a reoperation of a single CABG to OM combined with left ventricular aneurysmectomy by the same approach. Both cases showed satisfactory recoveries of the left ventricular function in the early postoperative period and patent grafts on postoperative angiograms. The left thoracotomy approach is a preferable alternative to median resternotomy for the reoperative CABG to OM, DG and left ventricular aneurysmectomy.

[Myocardial protection during aortic valve replacement: effectiveness of continuous warm blood cardioplegia].

Effectiveness of continuous warm blood cardioplegia (CWBC) during aortic valve replacement (AVR) was studied by comparing with intermittent cold GIK cardioplegia (ICGC) in 32 patients who underwent AVR using CWBC in 16 and ICGC in the other 16 patients. There was no operative nor hospital death in this series. In CWBC group, spontaneous recovery of the heart beat following aortic declamping was seen in 14 of 16 patients (87.5%), in contrast only in 4 of 16 (25%) in ICGC group. During the early postoperative period, left ventricular stroke work index (g.m/beat/m2) significantly increased from 41.0 +/- 14.4 to 55.9 +/- 8.0 (p < 0.001) in CWBC group, whereas no significant increase was found in ICGC group. Right ventricular stroke work index significantly increased only in CWBC group as well. In CWBC group, myocardial oxygen and lactate extraction rates were maintained within normal range during aortic cross-clamping, suggesting satisfactory myocardial preservation with an aerobic metabolism. In conclusion, CWBC is superior to ICGC as a myocardial protection during AVR.

[Repeat open heart surgery using continuous warm blood cardioplegia].

Myocardial protection during repeat open heart surgery still remains to be further improved. The purpose of this study was to evaluate the usefulness of continuous warm blood cardioplegia (CWBC) comparing with intermittent cold GIK cardioplegia (ICGC) in repeat open heart surgery. Twenty-four patients underwent repeat open heart surgery through re-sternotomy (11 mitral, 6 aortic 5 double, 2 congenital) were divided into two groups, that is 10 received CWBC (warm group) and 14 ICGC (Cold group). Spontaneous recovery of heart beat was obtained in 9 of 10 patients (90.0%) in warm group, in contrast only 2 of 14 (14.3%) in cold group (p < 0.001) following aortic declamping. Postoperative peak level of serum CK-MB in warm group (25.9 +/- 7.4 IU/l) was significantly lower than that (83.1 +/- 24.6) in cold group. In warm group left and right ventricular stroke work index significantly increased at 24 hours postoperatively, whereas no significant increase was found in cold group. Postoperative bleeding in the first 24 hours was less (553.8 +/- 38.9 ml) in warm group than that (974.3 +/- 54.1 ml) in cold group. In warm group 3 patients were operated on without homologous blood transfusion, in contrast none in cold group. Our results clearly demonstrated that CWBC was preferable to ICGC for myocardial protection in repeat open heart surgery.

[A surgically treated case of aortic arch aneurysm complicated with right middle cerebral artery occlusion].

A 65-year-old male diagnosed as an aortic arch aneurysm by computed tomography and angiography was treated surgically with success. He had had cerebral transient ischemic attack, but no symptoms of central nervous system. Cerebral angiography revealed complete occlusion of the right middle cerebral artery. The aneurysm was resected and replaced with Gelseal knitted Dacron prosthesis under the selective cerebral perfusion combining deep hypothermia. During cardiopulmonary bypass cerebral perfusion pressure was maintained over 50 mmHg, and arterial carbon dioxide tension was controlled by alpha-stat method. To our knowledge this is the first case of surgically treated aortic arch aneurysm complicated with middle cerebral artery occlusion. This experience would be valuable to decide about indication for surgical treatment of an aortic arch aneurysm complicated with cerebral vascular disease.

Left ventricular aneurysm, normal coronary arteries and embolization in a patient with systemic lupus erythematosus.

We describe a 30-year-old woman with a normal appearing coronary artery associated with SLE who suffered myocardial infarction with left ventricular aneurysm and systemic embolization including cerebral infarctions and saddle embolism. The patient was surgically treated with good results. To our knowledge this is the first reported case of systemic embolism due to myocardial infarction occurring in SLE with a normal coronary artery.

Influence of coronary artery disease and left ventricular dysfunction on postoperative mortality in vascular surgery.

In an attempt to assess the influence of coronary artery disease and left ventricular dysfunction on postoperative mortality, 107 patients consisting of 32 AAA resections and 44 aortoiliac and 31 femoropopliteal reconstructions were reviewed. All patients had a preoperative coronary angiograms and underwent cardiac catheterization to prevent cardiac-related deaths. Severe coronary artery disease was angiographically demonstrated in 40.6% of AAA, 31.8% of AI and 3.2% of FP patients. Severe left ventricular dysfunction was found in 21.9% of AAA, 18.2% of AI and 6.5% of FP. Both of the early and 5 (45.5%) of the 11 late deaths were caused by cardiac events. The nine-year survival rate (53.3%) in the patients with a documented combination of coronary artery disease and left ventricular dysfunction was significantly lower than those in patients with normal disease, normal left ventricular function and either documented coronary artery disease or left ventricular dysfunction. It is suggested from this series that left ventricular dysfunction is one of the most important risk factors in patients who undergo AAA resection and AI reconstruction and that severe disease and postoperative mortality are possibly reduced by certain kinds of interventional coronary therapies.

[Arachidonic acid metabolism and effectiveness of aprotinin treatment during cardiopulmonary bypass].

Arachidonic acid metabolism was investigated in 30 open heart cases, utilizing nonpulsatile cardiopulmonary bypass (CPB), consisted of 15 untreated cases (Group I) and 15 cases treated with aprotinin mostly given into CPB circuit during CPB (Group II). In group I, arterial blood concentration of thromboxane B2 (TXB2, stable metabolite of thromboxane A2, pg/ml) significantly increased from 45.9 +/- 40.5 preoperatively to 560.2 +/- 381.5 (p less than 0.01) at 30 minutes of CPB (total bypass) and to 830.5 +/- 591.1 (p less than 0.005) at the end of CPB (partial bypass). TXB2 levels in pulmonary artery (PA) and left atrium (LA) did not significantly increase just before, 5 minutes of CPB as compared with preoperative value. At the end of CPB TXB2 levels in PA (625.0 +/- 186.3) and LA (817.0 +/- 320.0) were significantly higher than preoperative value. However there was no significant difference between PA and LA values. Contrarily in group II TXB2 levels were significantly suppressed as compared with the value at each corresponding time in group I. beta-thromboglobulin levels also changed almost parallel to TXB2 levels in both groups. In conclusion, arachidonic acid metabolic disorders could occur in CPB circuit rather than in pulmonary circulation during CPB. Aprotinin administration into CPB circuit suppressed to some extent the platelet activation.

[Acute occlusion of the iliac arteries due to blunt trauma].

Two cases of acute iliac occlusion due to blunt trauma are presented. The cause of injuries were a fall from bicycle in case 1 and a compression between an automobile and a wall in case 2. The end-to-end anastomosis was possible in case 2, but an interposition of an artificial prosthesis was necessary because of the length of damaged artery in case 1. Both cases were associated with the pelvic fracture, adding the perforation of small bowels and the bladder in case 2. Postoperative course was almost uneventful except fasciotomy was needed for the compartment syndrome of the right lower extremity in case 2.

Effects of aprotinin on prostaglandin metabolism and platelet function in open heart surgery.

The effects of the protease inhibitor, aprotinin, on plasma prostaglandin levels and platelet function during and after cardiopulmonary bypass (CPB) were studied in a group of 23 patients which consisted of 11 untreated patients (control group) and 12 aprotinin-treated patients (aprotinin group). Thromboxane B2 (TXB2, a stable metabolite of thromboxane A2) and beta-thromboglobulin levels in the control group increased significantly during CPB compared with preoperative values. These increases were significantly suppressed in the aprotinin group. 6-Keto-PGF1 alpha (stable metabolite of prostacyclin) increased significantly during CPB in both groups, and there was no significant difference between the two groups. In the aprotinin group, the TXB2/6-Keto-PGF1 alpha ratio decreased significantly during CPB compared with the preoperative value, whereas no significant decrease was observed in the control group. Platelet counts decreased significantly during and after CPB in both groups. Platelet aggregability decreased significantly during CPB in the control group, whereas no significant decrease was found in the aprotinin group. In conclusion, aprotinin treatment improved prostaglandin metabolism and preserved platelet function during open heart surgery.

[Two cases of supposed metastasizing leiomyosarcoma of the uterus].

Case 1. A 57-year-old female had hysterectomy 10 years ago because of leiomyoma uteri. She was recently found to have a clear-cut round mass shadow in the right middle lung field on her chest X-ray film 3. The mass was resected and microscopically diagnosed as metastatic leiomyosarcoma. Re-examination of the pathological specimen of the uterine tumor resected 10 years ago revealed 5-9 mitosis per 10 high-powered fields (/10 HPF). Case 2. A 54-year-old female who had undergone hysterectomy for myoma uteri 9 years previously was found to have a well-defined oval shadow in the left lower lung field which was resected and pathologically diagnosed as metastatic leiomyosarcoma. Her uterus lesion microscopically revealed 1-2 mitosis/10 HPF. The relationship between metastatic leiomyosarcoma of the lung and mitotic activity of leiomyoma uteri was discussed.

[A case report of chest wall reconstruction utilizing microvascular surgery].

A 62-year-old man underwent left chest wall reconstruction after resection of the chest wall including 4-6th ribs for the metastatic tumor of squamous cell carcinoma of the left lung. The chest wall defect measuring 15 x 10 cm was reconstructed with double Marlex mesh in skeletal chest and covered with pedicled free mucocutaneous flap of tensor fasciae latae which was implanted by the vascular anastomoses to the thoracodorsal artery and vein using microvascular surgical technique. The flap was attached well and its blood supply was excellent on postoperative angiography.

[Implantation of a ringed intraluminal graft in ruptured type III dissecting aneurysm].

A 81-year-old man with a ruptured type III dissecting aneurysm was successfully treated by the sutureless technique using a ringed intraluminal graft. This method is very useful for such an acute dissection because of its easy and quick insertion.

[Improved myocardial protection by aprotinin pretreatment in prolonged global ischemia].

Protective effect of aprotinin pretreatment was assessed by functional, biochemical and morphological preservation in four hour global ischemia followed by one hour reperfusion in dogs. Cardioplegia was induced by intermittent infusion of cold Mg-lidocaine solution. Aprotinin 10,000 KIU/kg was given in low dose group (8 dogs), and 20,000 KIU/kg in high dose group (6 dogs); one half was given before ischemia and another half during ischemia. Betamethasone, coenzyme Q and nifedipine were also given equally in both groups before ischemia. Results were as follows: 1. Four (50%) of low dose group and all of high dose group were successfully taken off CPB and survived for one hour reperfusion. 2. High dose group showed significantly higher blood pressure and LVSWI than low dose group after one hour reperfusion (p less than 0.05). 3. Serum N-acetyl-beta-D-glucosaminidase and mitochondrial aspartate aminotransferase showed the significantly lower activity in high dose group than in low dose group after one hour reperfusion (p less than 0.05). There was no significant difference in the activities of serum beta-glucuronidase and MB-creatine kinase. 4. Myocardial tissues, excised after one hour reperfusion, contained significantly higher creatine phosphate in high dose group than in low dose group (p less than 0.05). There was no significant difference in the contents of adenosine triphosphate, calcium and water. 5. Severely injured mitochondrion were significantly lesser in high dose group than in low dose group. All lysosomes showed mild swelling or enlargement, but those membranous structures were well-preserved in both groups. In conclusion, aprotinin pretreatment might be effective in myocardial protection against prolonged global ischemia, by inhibiting the "leak out" of lysosomal enzymes.

Preservation of pancreatic beta cell function with pulsatile cardiopulmonary bypass.

Pancreatic islet cell function and tissue metabolism were studied during and after cardiopulmonary bypass in 38 patients undergoing an open heart operation. Twenty patients were operated on with pulsatile cardiopulmonary bypass (group I) and 18, with nonpulsatile cardiopulmonary bypass (group II). Hyperglycemia was observed during and early after operation in both groups. In group I during cardiopulmonary bypass, the immunoreactive insulin and c-peptide levels and the insulin to glucagon molar ratio increased significantly compared with the preoperative values, but in group II, these variables did not alter significantly. An hour postoperatively, the immunoreactive insulin (71 +/- 34 muIU/mL) and c-peptide (8.3 +/- 3.0 ng/mL) levels and the insulin to glucagon molar ratio (11.0 +/- 5.2) in group I were significantly higher than those in group II (immunoreactive insulin, 29 +/- 20 muIU/mL; c-peptide, 4.8 +/- 1.8 ng/mL; insulin to glucagon molar ratio, 3.4 +/- 2.6). The blood lactate level in group I (41 +/- 22 mg/dL) was significantly lower than that in group II (78 +/- 30 mg/dL) an hour postoperatively. In conclusion, pulsatile cardiopulmonary bypass is quite effective in preserving pancreatic beta cell function and tissue metabolism during and early after open heart procedures.

[Significance of coronary artery bypass grafting to totally occluded left anterior descending coronary artery].

The comparative studies on operative and hemodynamic results following coronary artery bypass grafting (CABG) were performed in 15 patients with totally occluded left anterior descending coronary artery (TOLAD) and 24 with partially occluded LAD (POLAD). There were two operative deaths and one whose graft was obstructed in POLAD. Four patients were revealed to have transmural myocardial infarction (TMI) in the region other than anterior segment on the preoperative electrocardiogram. Following results were obtained in 13 TOLAD (Group I) and 19 POLAD (Group II) with two subgroups, a: without TMI and b: with anterior TMI, whose all bypass grafts were patent. Left ventricular ejection fraction, Mean Vcf and left ventricular anterior, apical segmental wall motion significantly increased postoperatively in all groups, whereas postero-inferior segmental wall motion did not increase in all groups. Cardiac index and PLVSP/LVESV significantly increased postoperatively in all groups, but did not in Group Ib. Angina disappeared postoperatively in 12 patients (92.3%) in group I and 16 (84.2%) in Group II. In both groups, NYHA classification was improved from class III or IV preoperatively to class I or II postoperatively. Postoperative 10 years actuarial survival rate was 90.7% in Group I and 90.8% in Group II. In conclusion, it was proved that CABG to TOLAD offered significant increase in left ventricular contractility, better quality of life and satisfactory long term survival rate almost same as CABG to POLAD.

The influence of coronary artery bypass grafting to totally occluded coronary arteries on the left ventricular contractility.

Sixteen patients underwent 16 coronary artery bypass grafts (CABG) to totally occluded coronary arteries (TOCA), including 12 left anterior descending coronary arteries (LAD) and 4 right coronary arteries (RCA). Of these 16 CABGs, 2 of the RCA grafts became obstructed postoperatively and the remaining 14 patients with patent grafts were divided into the two following groups: 8 with previous infarcts in the region perfused by the TOCA (Group I) and 6 with no previous infarcts (Group II). The left ventricular (LV) ejection fraction and the mean verocity of circumferential fiber shortening significantly increased postoperatively in both groups and the PLVSP/LVESV significantly increased postoperatively in Group II. The LV segmental wall motion (SWM) in the region of TOCA significantly increased postoperatively in both groups. In 5 of the Group I patients, whose anterior and apical SWM was less than the lowest value of the normal subjects, the anterior and apical SWM significantly increased postoperatively. We thus concluded that CABG to totally occluded LAD results in an excellent graft patency rate, a significant improvement of SWM in the region of the TOCA and global LV contractility, even in patients with severe segmental dysfunction due to previous infarcts.

[A case report of aortic and mitral regurgitation combined with ankylosing spondylosis].

The purpose of this communication is to present a successful case of surgical treatment of aortic and mitral valve regurgitation associated with ankylosing spondylosis. A 48-year-old male was admitted with symptoms of palpitation and shortness of breath. His heart murmur had been pointed out for 4 months prior to this admission. His previous history did not show any evidence of rheumatic heart disease. Retrograde aortography showed moderate to severe aortic valvular regurgitation and echocardiography revealed mitral valve regurgitation with minor degree. At the same time he complained of rigidity of neck muscle as well as back pain for last 15 years. He underwent aortic valve replacement and mitral valve was left alone. His postoperative course was uneventful. In Japan, aortic valve regurgitation associated with ankylosing spondylosis has been reported to be very rare compared to the European or American people. Several important features in the diagnosis and operative treatment for this combination of diseases have been also discussed.

Role of protease inhibition in myocardial preservation in prolonged hypothermic cardioplegia followed by reperfusion. Effect of aprotinin in an experimental model.

The effects of aprotinin on canine myocardium subjected to cardioplegia and global ischemia for 4 hours and then reperfused for 1 hour were investigated. Lysosomal and mitochondrial enzymes and cyclic nucleotides (adenosine cyclic monophosphate and guanosine cyclic monophosphate) were measured in coronary sinus blood. Aprotinin was given intravenously before cardiopulmonary bypass at total doses of 10 X 10(3) kallikrein units per kilogram (group A, six dogs) and 20 X 10(3) KU/kg (group B, six dogs). In group A, three dogs survived but with poor cardiac function; all dogs in group B survived and had better cardiac function. Lysosomal (N-acetyl-beta-D-glucosaminidase) and mitochondrial (aspartate aminotransferase) enzymes in coronary sinus blood at 60 minutes of reperfusion were significantly (p less than 0.05) lower in group B than in group A. In both groups, guanosine cyclic monophosphate was significantly (p less than 0.01) lower during reperfusion than before cardiopulmonary bypass; however, the values were significantly (p less than 0.05) higher in group B than in group A. Serum adenosine cyclic monophosphate was lower during reperfusion than before bypass in both groups, but it recovered during reperfusion in group B. Myocardial adenosine triphosphate was well preserved in both groups but creatine phosphate was decreased (p less than 0.01) in group A. These results suggest that aprotinin at a dose of 20 X 10(3) KU/kg may be effective in preserving myocardial viability and function after prolonged cardioplegia.