Biomedical subjects

H Raffa

Publications and source records attributed to H Raffa.

At least 19 recordsLinked to original sources

PubMed2002

Transplantation of the human uterus.

Human uterine transplantation was performed on 6 April 2000 on a 26-year-old female who lost her uterus 6 years earlier due to post-partum hemorrhage. The donor, a 46-year-old patient with multiloculated ovarian cysts, underwent a hysterectomy modified to preserve tissue and vascular integrity. The donor uterus was connected in the orthotopic position to the recipient's vaginal vault and additional fixation was achieved by shortening the uterosacral ligament. The uterine arteries and veins were extended using reversed segments of the great saphenous vein, then connected to the external iliac arteries and veins, respectively. Immunosuppression was maintained by oral cyclosporine A (4 mg/kg/body wt.), azathioprine (1 mg/kg/body wt.) and prednisolone (0.2 mg/kg/body wt.). Allograft rejection was monitored by Echo-Doppler studies, magnetic resonance imaging (MRI), and measurement of the CD4/CD8 ratio in peripheral blood by fluorescence activated cell sorter (FACS scan). An episode of acute rejection was treated and controlled on the ninth day with anti-thymocytic globulin (ATG). The transplanted uterus responded well to combined estrogen--progesterone therapy, with endometrial proliferation up to 18 mm. The patient had two episodes of withdrawal bleeding upon cessation of the hormonal therapy. Unfortunately, she developed acute vascular thrombosis 99 days after transplantation, and hysterectomy was necessary. Macro- and microscopic histopathological examination revealed acute thrombosis in the vessels of the uterine body, with resulting infarction. Both fallopian tubes remained viable, however, with no evidence of rejection. The acute vascular occlusion appeared to be caused by inadequate uterine structure support, which led to probable tension, torsion, or kinking of the connected vascular uterine grafts.

Adult↗

PubMed1998

Early experience with transmyocardial laser revascularization.

Conventional treatment of coronary artery disease consists of either Coronary Artery Bypass Grafting (CABG), medical therapy or percutaneous transluminal coronary angioplasty (PTCA) or a combination. However, certain group of patients do not even qualify for CABG. Transmyocardial Laser Revascularization (TMR) is a unique new surgical modality specially for that sub group of patient population who have small and diffuse coronary artery disease not suitable for grafting. King Fahad Heart Center initiated its TMR program in February, 1994 and until February, 1996, 100 patients under went the TMR procedure. Eighty-one were males and 19 females with a mean average age of 55 years. Seventy-nine patients had 3 vessel disease (VD) and 66 patients had non-graftable small vessels. Ten patients had left ventricular ejection fraction (LVEF) less than 30%. All the patients underwent a strict protocol of follow-up. The pre and post TMR assessment at six months and 12 months follow-up showed an increase in LVEF at six and 12 months as compared to pre TMR level. The exercise time also increased from a base line level at six months and showed further improvement at 12 months which was statistically significant (p < 0.05) along-with VO2 max, which also showed improvement. Clinically, haemodynamically and symptomatically these patients showed significant improvement and use of anti-anginal drugs (87%) was reduced to minimum. Isotope myocardial perfusion scan on 15 segment viability score showed an improvement from pre TMR level of 33.8 to 45.9 at post TMR 12 months follow up. The surgical mortality in this high risk TMR population was 10%. TMR was found to be a reasonable alternative to medical treatment in patients with angina due to diffuse and or small vessel disease or occluded previous grafts not amenable to CABG.

Adult↗

PubMed1998

Thrombotic obstruction of bileaflet mechanical prosthetic heart valves: early diagnosis and management.

BACKGROUND: Thrombosis of mechanical prosthetic heart valves (TMPHV) is one of the major complications that accounts for the highest morbidity and mortality related to Bileaflet Mechanical Prosthetic Heart Valves (BMPHV). MATERIALS AND METHODS: During the last six years we had ten cases of bileaflet mechanical valve thrombosis. All patients had undergone emergency surgical interventions except one who developed systemic embolization and massive brain insult immediately after admission for surgery and died two months later. We divided the patients in two groups, first group includes five patients who came in acute pulmonary edema and emergency operation was done either to replace the thrombosed BMPHV (in two) or successful thrombectomy was achieved (in three) and all of them have survived. The second group (four patients) presented with cardiogenic shock and required emergency femoro-femoral bypass. Two patients survived after thrombectomy and the other two could not come off bypass after changing the TMPHV and in spite of Intra-aortic balloon pump, they died 24 and 48 hours after the procedure. All patients received intravenous heparin on admission. Preoperative i.v. Streptokinase was given in two cases, of which one required thrombectomy and the other had valve replacement and died 24 hours later. RESULTS: Early diagnosis and operation still had the best results in TMPHV though thrombolytic therapy was successful in few reported early presented cases. All patients who had thrombectomy of the TMPHV have survived without any morbidity. Follow up of survived patients ranged between two months and six years with a mean of 24.1 months. It is worth attempting thrombectomy of the thrombosed BMPHV rather than re-replacement which carries higher morbidity and mortality, because of the longer ischemic arrest during operation which further depletes the energy of the myocardium. CONCLUSIONS: Though this is a small number of patients to make a definite conclusion, thrombectomy was more feasible in CarboMedics Prosthetic Heart Valves, since its in situ rotation that allows reorientation of its leaflets and declotting of valve hinge to be performed.

Adult↗

PubMed1994

Fatal bilateral phrenic nerve injury following hypothermic open heart surgery.

A 30-year-old woman underwent mitral valvotomy for severe mitral stenosis. Extracorporeal circulation by means of cardiopulmonary bypass and systemic hypothermia, in addition to local topical hypothermia using iced saline solution and slushed ice, was used. Fatal bilateral phrenic nerve paralysis with inability to wean her from the ventilator occurred. This report is presented to illustrate the pathophysiology, pathology, and means of possible prevention of such a potentially highly fatal injury following hypothermic open heart surgery.

Adult↗

PubMed1992

Central cyanosis due to prominence of the eustachian and thebesian valves.

A 9-year-old female child with serious central cyanosis was found to have right to left shunt across a large secundum atrial septal defect despite normal right-sided pressures. Preoperative cross-sectional echocardiography suggested the presence of large sinus venosus eustachian and thebesian valves as the mechanism responsible for diversion of the inferior caval and coronary sinus venous return to the left atrium across the interatrial secundum defect. Surgical excision of the unduly prominent sinus venosus valve and patch closure of the atrial septal defect resulted in complete disappearance of the cyanosis and physiological and clinical cure.

Arteriovenous Malformations↗

PubMed1992

Repair of torn aortic root with the left atrial appendage.

A narrow aortic root and a small aortic annulus made aortic valve replacement in a 35-year-old female patient with calcified aortic stenosis rather difficult. At the end of the procedure, it was noticed that the aortic root was badly torn. The tear started at the end of the aortotomy incision, near the commissure between the non-coronary and left coronary cusps, ran flush with the prosthetic ring and extended beneath and a few millimeters beyond the ostium of the left coronary artery. Only a thin rim of the aortic wall was left proximally, which was not strong enough to support the sutures. The aorta was repaired using a pericardium covered Goretex patch, bolstered by the left atrial appendage.

Adult↗

PubMed1991

Sinus of Valsalva aneurysm eroding into the interventricular septum.

We report a case of erosion of an aneurysm of the right sinus of Valsalva into the interventricular septum. The mode of presentation, the preoperative evaluation, and the echocardiographic and nuclear magnetic resonance imaging features are presented, and the cardiac catheterization findings and surgical management of this very rare cardiac pathology are discussed.

Adult↗

PubMed1991

Superimposition of a mechanical valve on an impacted aortic bioprosthesis.

During reoperation for replacement of a regurgitant aortic bioprosthesis (a 23-mm bovine pericardial valve), it was judged that total removal of the valve would be difficult, and hazardous to the patient. Therefore, its leaflets were excised and its sewing ring left in situ. A 21-mm Carbomedics bileaflet mechanical valve was sutured to the bioprosthetic sewing ring and implanted in the orifice of the bioprosthesis, resulting in excellent hemodynamic performance. We report this new technique to illustrate its feasibility, safety, and efficiency, as an alternative to complete removal of defective prostheses in the aortic position.

Journal Article↗

PubMed1990

Constrictive pericarditis in Saudi Arabia.

Twenty four patients underwent pericardectomy for constrictive pericarditis. There were 2 operative deaths. Tuberculosis was the aetiological factor in 20 patients and a post surgical aetiology was found in 2 patients. The aetiology remained unclear in 2 patients.

Adolescent↗

PubMed1988

Mitral valve replacement in children.

Rheumatic fever leading to advanced valvular heart disease, in adults and children, is still frequently seen in developing countries. In the period 1981-87, 1137 patients underwent open heart surgery for either repair (489 patients), or replacement (639 patients) of defective cardiac valves. The experience with 75 children who underwent mitral valve replacement among this group is reviewed. The aetiology of mitral valve disease was rheumatic in 71, and infective endocarditis in four; 85% of the children were in NYHA functional class III, and 15% in class IV. Seven children had intra-operative findings of rheumatic activity. Pure mitral regurgitation was seen in 41, while mixed mitral valve disease was observed in 34 children. Twenty-seven children underwent mitral valve replacement with Ionescu-Shiley bovine pericardial valves, and 48 with mechanical Bi-leaflet valves. The operative mortality was 9.3%, and the actuarial survival rate, calculated by the Cutler and Ederers method, was 87% at 5 years.

Adolescent↗

PubMed1988