תוצאת חיפוש

Use of Abciximab (Reopro) in the Catheterization Laboratory and in Unstable Coronary Syndromes

Shmuel Banai, Andre Keren, Nataly Daniel, Jesaia Benhorin

Heiden Dept. of Cardiology, Bikur Cholim Hospital, Jerusalem

Blockage of platelet glycoprotein IIb/IIIa receptor by Reopro c7E3 Fab-abciximab) has been shown to reduce markedly ischemic complications during and following elective and high-risk coronary intervention CI). Between July ’96 and February ’98, 120 consecutive patients (85 men and 34 women, aged 34-90 - mean 62) received Reopro (20 mg bolus, followed by 10 mg/min for 12-48 hours). 100 were treated with Reopro in the catheterization laboratory, in 76 as prophylactic treatment preceding high-risk CI and in 24 as bailout treatment for acute complications during CI. 20 additional patients were treated in the CCU for acute coronary syndromes, 17 of whom underwent CI 6-48 hours later.

Coronary angiography demonstrated multivessel disease in 66 (56%), and the target lesions were LAD - 77, RCA - 41, LCX - 22, SVG - 6, and 2 unprotected LMCA (total: 148 lesions dilated in 117 patients). Of the 117 CI, 44 were PTCA alone, and 73 included stenting.

Indications for prophylactic Reopro for high risk CI were: acute MI (48 hours), early post-MI angina, unstable AP, and/or complex anatomy with visible thrombus. In this high-risk population the overall success rate (open artery, no MI, discharged alive, no need for urgent re-vascularization) was 97% when Reopro was given prophylactically prior to CI. The success rate was lower (87.5%) when Reopro was given in bailout situations.

In 20 patients with acute coronary syndromes treated in the CCU while receiving maximal combined conventional therapy (including full-dose heparin), all symptoms and dynamic ischemic ECG changes disappeared within minutes following Reopro. 17 underwent successful CI during hospitalization and 3 were treated medically.

Reopro given prior to high risk CI was associated with a very low rate of complications. In a few cases with acute coronary syndromes, Reopro given in the CCU cases immediate relief of myocardial ischemia and reduced the need for urgent coronary intervention.

Characteristics, Management and Prognosis of Acute Myocardial Infarction (Israel 1990-1996)

Israeli Survey Group On Acute Myocardial Infarction

From 1990 to 1996 we conducted consecutive 2-month surveys in all CCUs (n=26) in Israel. The aim was to compare the characteristics, management, and prognosis of patients with acute myocardial infarction (AMI) between the 4 surveys.

Patient characteristics were similar in all surveys. About 75% of patients were males and had a first MI. Mechanical and arrhythmic complications decreased slightly between 1990 and 1996. In contrast, frequency of treatment with thrombolysis, aspirin, beta-blockers and ACE-I, as well as coronary interventional procedures, increased tremendously.

In parallel, 30-day and 1-year mortality decreased significantly, from 16.5% and 22.5%, respectively, to 9.0% and 13.9%. After multiple adjustment for factors associated with mortality, the 30-day relative risk of death for patients hospitalized in 1992, 1994 and 1996 was 0.79 (95% CI 0.59-1.08), 0.75 (95% CI 0.56-1.01) and 0.54 (95% CI 0.39-9.74), respectively, as compared with 1990.

Although there is no direct proof that changes in management of AMI are related to the reduction in mortality seen during the course of the surveys, the association seems likely.

Percutaneous Revascularization of the Left Main Coronary Artery as Coronary Artery Bypass in High Surgical Risks

Yoseph Rozenman, Chaim Lotan, Hisham Nassar, Mervyn S. Gotsman

Cardiology Dept., Hadassah-University Hospital (Ein Kerem) and Hebrew University-Hadassah Medical School, Jerusalem

Coronary artery bypass grafting is the treatment of choice for obstructive disease of the left main coronary artery. Its proximal location and easy accessibility make the left main artery an inviting target for percutaneous intervention, an approach contraindicated by the high associated risk. We describe 2 patients at high operative risk in whom the obstructed main coronary artery was successfully revascularized percutaneously. Coronary stenting and rotational ablation of calcified arteries are essential for successful outcome and minimize complications.

Skeletonized Internal Mammary Arteries for Coronary Bypass Grafting

Jacob Gurevitch, Yosef Paz, Menachem Matsa, Amir Kramer, Dimitri Pevni, Oren Lev-Ran, H. Locker, Raphael Mohr

Dept. of Thoracic and Cardiovascular Surgery, Sourasky-Tel Aviv Medical Center

The skeletonized internal mammary artery (IMA) is longer, and its immediate spontaneous blood flow is greater than that of the pedicled IMA, thus providing increased versatility for complete, arterial myocardial revascularization without the use of saphenous vein grafts. From April 1996 to May 1997, 583 patients underwent coronary artery bypass grafting here and in 415 (71%) complete arterial revascularization was achieved using bilateral skeletonized IMA. The right gastroepiploic artery was used in 57 (13%); there were 329 males (79%) and 86 women (21%); average age was 64 (30-87) and 175 (36%) were older than 70; 131 (32%) were diabetics. Average number of grafts was 3.2 (range 2-6 grafts). At 30 days, 5 (1.2%) had died and there had been 6 perioperative infarcts (1.4%), 5 CVA's (1.2%), and 6 had sternal wound infections (1.4%). Up to 1-12 months of follow-up was achieved in 409 (99%). Late mortality was 1.4% (of which 3 were noncardiac). 394 (97%) were angina-free at latest follow-up. We conclude that arterial revascularization using bilateral skeletonized IMA is safe, as postoperative morbidity and mortality are low, even in old and diabetic patients.

Circadian Fluctuations of the Signal-Averaged ECG

Ehud Goldhammer, Edward Abinader

Cardiology Dept., Bnei-Zion Medical Center and Bruce Rappaport Faculty of Medicine, The Technion, Haifa

Circadian periodicity for the time of onset of acute myocardial infarction has been shown; the early morning peak of infarction coincides with the onset of other related phenomena, including sudden cardiac death, ventricular arrhythmias, thrombotic stroke, etc. Late potentials detected by the signal-averaged ECG are considered to be independent markers of vulnerability to ventricular arrhythmias. The signal-averaged ECG enables the amplifying and recording of small bioelectric signals of cardiac origin, while eliminating extraneous electrical "noise." To determine whether late potentials are themselves subject to circadian influence, 31 patients (age range 41-79) who had had an old or recent myocardial infarction underwent late potential assessment by the signal-averaged ECG. 4 indices were studied: duration of late LPD potentials (LPD), total QRS duration (TQRS), and root mean square voltage of the last 40 msec, and of the last 50 msec (RMS 40 and RMS 50). These indices were assessed 3 times, during the early morning hours, at noon and during the evening. Morning LPD differed significantly from noon and evening LPD and the morning RMS 40 similarly differed from noon and evening values. TQRS and RMS 50, even though remaining in the normal range, also showed a tendency to abnormal values during morning hours. These findings could possibly be related to the early morning incidence peaks of severe ventricular arrhythmia and sudden cardiac death, since abnormal late potentials constitute the physiopathological basis for certain ventricular arrhythmias.

Embolic Splenic Infarction: A Rare Complication of Atrial Fibrillation

Doron Merims, Doron Zilberman, Liliana Lupu, Emanuel Sikuler

Depts. of Medicine B and Radiology, Soroka Medical Center and Ben-Gurion University of the Negev, Beer Sheba

Splenic infarction is a rare disorder. The typical clinical presentation is sudden pain in the left upper quadrant of the abdomen, and awareness to this possibility is the major clue for diagnosis. We describe a 49-year-old man with chronic atrial fibrillation and splenomegaly who was treated with anticoagulants. Because of hematuria, the regular dose of anticoagulant therapy was reduced. The hematuria stopped but he complained of sudden onset of pain in the left upper quadrant. Computerized tomography and isotope scan of the spleen confirmed the clinical suspicion of splenic infarction. Treatment with anticoagulants and analgesics was followed by clinical improvement.