Search PubMed⌕ Search

Biomedical subjects

G Dorros

Publications and source records attributed to G Dorros.

125 records · Page 7Linked to original sources
PubMed1983

Employment and recreation patterns in patients treated by percutaneous transluminal coronary angioplasty: a multicenter study.

Employment and recreational patterns were analyzed in 279 patients who underwent percutaneous transluminal coronary angioplasty (PTCA) for treatment of symptomatic coronary artery disease. PTCA was successful in 180 patients (65%). When it was unsuccessful, coronary artery bypass graft surgery was usually performed (80%). Return-to-work rates were high irrespective of the outcome of PTCA. Of patients employed full-time or part-time before treatment, 98.5% of those who had successful PTCA alone and 97% of those whose PTCA was unsuccessful but who underwent uncomplicated coronary artery bypass surgery maintained or improved their work status. In a subgroup of men who had been employed in occupations requiring physical labor, 85% of the men whose PTCA was successful returned to work, compared with 68% of those whose PTCA was unsuccessful. The interval from attempted PTCA to return to work was significantly shorter in the successfully treated group; in patients with successful PTCA, the median time to return to work was 14 days, compared with 60 days in patients in whom PTCA was unsuccessful (p less than 0.001). During follow-up, patients with successful PTCA had less angina and were more active in recreational activities than patients who required alternative treatments.

Angioplasty, Balloon↗
PubMed1983

Transluminal coronary angioplasty: comparison of brachial and femoral artery methods.

The brachial and femoral artery methods for (percutaneous) transluminal coronary angioplasty are compared. We attempted 901 angioplasties with 539 (59.8%) via the brachial and 362 (40.2%) via the femoral artery. The stenosis was crossed in 670 attempts (74%); in 410 (76%) via the brachial, and in 260 (72%) via the femoral artery. Successful angioplasty was achieved in 607 attempts (67%): in 370 (69%) via the brachial, and in 237 (65%) via the femoral artery. There was no difference between the techniques in crossing the stenosis or achieving a primary success. The left anterior descending artery stenosis was statistically more likely to be crossed than a stenosis in the right (p less than 0.001), circumflex (p less than 0.05), left main coronary artery (p less than 0.05), or saphenous vein graft (p less than 0.05); the left anterior descending artery stenosis was more likely (p less than 0.05) to be successfully dilated if the lesion were crossed (410 of 445 cases, 92%) than a right coronary stenosis (117 of 136 cases, 80%). The brachial and femoral artery methods are comparable techniques. Interventional angiographers performing coronary angioplasty should utilize the angiographic approach with which they are most familiar.

Angioplasty, Balloon↗
PubMed1983

Percutaneous transluminal coronary angioplasty: report of complications from the National Heart, Lung, and Blood Institute PTCA Registry.

The complications reported in the first 1500 patients enrolled in the National Heart, Lung, and Blood Institute Percutaneous Transluminal Coronary Angioplasty (PTCA) Registry are analyzed. Data were contributed from 73 centers between September 1977 and April 1981. PTCA was successful in 63% of attempts. Five hundred forty-three in-hospital complications occurred in 314 patients (21%). The most frequent complications were prolonged angina in 121, myocardial infarction (MI) in 72, and coronary occlusion in 70. One hundred thirty-eight patients (9.2%) had major complications (MI, emergency surgery or in-hospital death). One hundred two patients (6.8%) required emergency surgery, usually for coronary dissection or coronary occlusion. Sixteen patients (1.1%) died in-hospital; the mortality rate was 0.85% in patients with one-vessel disease and 1.9% in those with multivessel disease. The mortality rate was significantly higher in patients who had had bypass surgery (p less than 0.001). Nonfatal complications were significantly influenced by the presence of unstable angina (p less than 0.001) and initial lesion severity greater than 90% diameter stenosis (p less than 0.001). This report delineates and assesses the complications encountered with PTCA during its initial 3 1/2-year clinical experience. These results support the relative safety of PTCA as a method of nonsurgical myocardial revascularization in carefully selected patients.

Adult↗
PubMed1982

Dorros-Spring pressurizer: an inflation device for use in transluminal angioplasty procedures.

A simple hand-operated balloon inflation device has been developed for use in coronary and peripheral transluminal angioplasty procedures. This device is compact, portable, and easily sterilized and eliminates the need for compressed gas, pneumatic pistons, carbon dioxide cartridges, or a complex holder or mounting apparatus. This device, the Dorros-Spring pressurizer, provides for precise control of pressures which inflate the angioplasty dilatation catheters by means of an hydraulic saline-contrast system. This inflation device has been used in over 150 coronary and 100 peripheral transluminal angioplasties without the occurrence of failure of mechanical components or loss of calibration.

Angioplasty, Balloon↗
PubMed1982

The brachial artery method to transluminal coronary angioplasty.

The development of a brachial artery guiding catheter for (percutaneous) transluminal coronary angioplasty is described. Three-hundred angioplasty procedures were attempted with 196 (65%) via the branchial and 104 (35%) via the femoral artery. The coronary stenosis was crossed in 202 attempts (67%); in 138 via the brachial (70%) and 64 via the femoral artery (62%). A successful angioplasty occurred in 117 via the brachial (85%) and in 50 via the femoral artery (78%). Successful angioplasty of the left anterior descending artery was equally effective with either technique. Successful angioplasty of the right coronary artery was more difficult (P less than 0.05) using the femoral artery. An unsuccessful angioplasty with one technique was occasionally overcome by use of the other technique. No brachial artery complications were encountered. The brachial method to transluminal coronary angioplasty is an acceptable and complementary alternative to the femoral technique. Those laboratories contemplating percutaneous transluminal coronary angioplasty may desire to utilize both approaches.

Angina Pectoris↗
PubMed1982

Percutaneous transluminal coronary angioplasty: report from the Registry of the National Heart, Lung, and Blood Institute.

Data have been collected from 34 centers in the United States and Europe performing percutaneous transluminal coronary angioplasty since September 1977. The procedure was carried out in 631 patients, with an average age of 51 years (range 23 to 76), of whom 80 percent had single vessel coronary disease, 17 percent had double or triple vessel disease and 3 percent had stenosis of the left main coronary artery. Coronary angioplasty was successful (greater than 20 percent decrease of coronary stenosis) in 59 percent of the stenosed arteries. The mean degree of stenosis was reduced from 83 to 31 percent. Emergency coronary bypass operation was required in 40 patients (6 percent). Myocardial infarction occurred in 29 patients (4 percent). In-hospital death occurred in six patients (1 percent), three with single vessel and three with multivessel disease. Ninety-one patients have been followed up for at least 1 year after coronary angioplasty. Of the 65 patients with an initially successful angioplasty, 83 percent were in improved condition compared with their status before angioplasty. Thus, the initial satisfactory results obtained in a few centers have now been confirmed in many centers using transluminal coronary angioplasty.

Adult↗
PubMed1976

The prenatal diagnosis of intrauterine growth retardation in one fetus of a twin gestation.

The prenatal care of twin gestations is primarily concerned with attempts at preventing premature labor and the management of obstetric difficulties. Little data are available prior to delivery, apart from Rh-isoimmunized twin gestations, concerning an individual fetus' well-being in a twin gestation. Ultrasonography has been concerned with the single gestation, and has not been used extensively in the care and evaluation of twin gestations, apart from early diagnosis of the condition. This report involves a twin gestation in which a significant repeated difference in the ultrasonographic fetal biparietal diameter measurements clearly identifies a normal fetus and a fetus with intrauterine growth retardation. The management of this patient could have been more aggressive with the present knowledge available and so resulted in better perinatal outcome.

Adult↗
PubMedDate not supplied

Angiography of the internal mammary artery via the contralateral brachial artery.

A new technique for angiography of the contralateral internal mammary artery via the brachial artery approach is described. A Simmons (sidewinder) catheter is maneuvered into the ascending aorta and is rotated as to assume its performed shape. The catheter is advanced into the contralateral subclavian artery beyond the internal mammary artery. With the aid of an exchange wire, the Simmons catheter is replaced with a preformed internal mammary angiographic catheter. The internal mammary artery is cannulated, and angiography is performed. Fifty patients were successfully studied by means of this technique without incident. In 20 cases, the ipsilateral internal mammary artery was subsequently visualized. Brachial angiographers may prefer to add this technique to their repertoire.

Angiography↗
PubMedDate not supplied

Percutaneous transluminal valvuloplasty in calcific aortic stenosis: the double balloon technique.

The double balloon technique for aortic valvuloplasty using a combined brachial and femoral artery approach with readily available angioplasty equipment is described. Online hemodynamic assessment of the patient during the procedure was provided by continuous, reflective spectorphotometric monitoring of the pulmonary artery mixed venous oxygen saturation and the arterial pressure in the femoral sheath. Successful valvuloplasty was achieved in 10 patients with the transaortic peak-to-peak systolic gradient reduced from 77.6 +/- 28 to 27.8 +/- 15 mmHg (P less than 0.001), the mean gradient from 62.0 +/- 24 to 26.0 +/- 15 mmHg (P less than 0.0007), and the aortic valve area increased from 0.56 +/- 0.3 to 1.03 +/- 0.6 cm2 (P less than 0.05). No significant complications were encountered. The double balloon technique for aortic valvuloplasty is an acceptable alternative method to the single balloon technique.

Aged↗
PubMedDate not supplied

Successful thrombolysis of a chronically occluded femoropopliteal synthetic bypass graft via the popliteal approach: case report.

Thrombolysis of an occluded femoropopliteal synthetic bypass graft was performed via the popliteal artery approach for infusion catheter placement and urokinase delivery. Graft thrombolysis was achieved without complication. The proximal graft anastomosis could not be identified and prevented selective antegrade catheter placement and infusion. Because the distal graft anastomosis was visualized, the percutaneous popliteal approach was used. Subsequently, angioplasty was performed of an unmasked stenosis that presumably led to graft closure. We can conclude that selective thrombolysis via catheter placed from popliteal thrombolysis is an effective technique for recanalization of occluded femoropopliteal bypass grafts if the antegrade approach is not feasible.

Aged↗
PubMedDate not supplied

Multicenter trial of the wallstent in the iliac and femoral arteries.

PURPOSE: To report the results of the FDA phase II, multicenter trial of the Wallstent in the iliac and femoral arteries. PATIENTS AND METHODS: Two hundred twenty-five patients entered the trial. Stents were placed in the iliac system in 140 patients and in the femoral system in 90 (five patients required both iliac and femoral stents). Clinical patency was measured over 2 years by means of life-table analysis with use of clinical and hemodynamic data and the Rutherford scale. Angiographic patency was measured at 6 months. RESULTS: In the iliac system the primary clinical patency was 81% at 1 year and was 71% at 2 years. The secondary clinical patency was 91% and 86%, respectively. The 6-month angiographic patency was 93%. In the femoral system the primary clinical patency was 61% at 1 year and 49% at 2 years. The secondary patency was 84% and 72%, respectively. The 6-month angiographic patency was 80%. CONCLUSIONS: The results are similar to those with the Palmaz stent in the iliac system and with angioplasty alone in the iliac and femoral systems.

Adult↗