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        תוצאת חיפוש

        אוקטובר 1998

        בנימין זאבי, מיכאל ברנט, רמי פוגלמן, גלית בר-מור ולאונרד בלידן
        עמ'

        Transcatheter Closure of Atrial Septal Defect

         

        Benjamin Zeevi, Michael Berant, Rami Fogelman, Galit Bar-Mor, Leonard Blieden

         

        Cardiology Institute, Schneider Children's Medical Center, Petah Tikva and Sackler School of Medicine, Tel Aviv University

         

        Isolated secundum atrial septal defect is one of the most common congenital heart defects. Surgical closure is the treatment of choice but is associated with a chest scar, some morbidity and a relatively long recovery and the use of cardiopulmonary bypass. Transcatheter closure of secundum atrial septal defect is therefor an attractive approach.

        3 children, aged 5-10 years, underwent successful transcatheter closure of moderate to large central atrial septal defects with the Cardioseal device. The procedures were performed under x-ray and transesophageal echocardiographic guidance.

        Our initial experience, and that of others, indicates that transcatheter occlusion of secundum atrial septal defects is safe and effective and can be an appropriate alternative in approximately 60% of patients.

        יוני 1998

        לודויג קורנל וארתור פראנקן
        עמ'

        Mechanism of Primary Hypertension

         

        Ludwig Kornel,* Arthur V. Prancan

         

        Steroid Research Laboratory, Depts. of Internal Medicine and Biochemistry, and Dept. of Pharmacology, Rush Medical Center, Chicago and *Endocrinology-Diabetes Outpatient Clinic, Kupat Holim Klalit, Jerusalem

         

        We review various theories of the pathogenetic mechanisms of steroid-induced and essential hypertension. We investigated the possibility that a pathogenetic mechanism leading to glucocorticoid (GC)-induced hypertension or to mineralocorticoid (MC)-induced hypertension, or both, may be of critical importance in primary hypertension. We studied plasma levels of corticosterone (BK) and aldosterone (Aldo), and their concentrations in arterial and renal tissues of spontaneously hypertensive rats (SHR), a model of primary hypertension, and in the antecedent strain WKY rats as a normotensive control. Plasma levels of BK and Aldo were found to be normal and identical in SHRs and WKYs. Tissue (intracellular) levels of BK were more than double in SHRs than in WKYs. Subsequently we examined the activity of 11b-hydroxy steroid dehydrogenase (11-HSD) in both aortic and renal tissues of SHRs and WKYs. 11-HSD converts BK to the corresponding 11-keto compound, 11-dehydro-corticosterone (cpd.AK), which is inactive, in view of its inability to bind to the MC receptors (and also to the GC receptors). BK, the main glucocorticoid in the rat, as well as cortisol, have high affinity for the MC-receptor (MR). Normally BK or cortisol are present in 10²-10³ times greater concentrations than Aldo in tissues possessing MR. The enzyme 11-HSD deactivates BK (or cortisol), thus protecting MC-receptors in the MC target tissues from being activated by GC. When we examined arterial and renal tissue activities of 11-HSD in SHRs, the activity of 11-HSD was only one-third that found in the WKY rats. This explained higher levels of BK in the tissues of SHR, and suggested that decreased activity of 11-HSD is a pathogenetic factor for hypertension in SHRs.

        Thus, in a model of primary hypertension such as SHR, decreased activity of 11-HSD in the target tissues of MC appears to lead to glucocorticoid-induced mineralocorticoid hypertension.

        מאי 1998

        רותי מרגלית-סטשפסקי, אברהם לורבר ואיל מרגלית
        עמ'

        Familial Occurrence of Ebstein Anomaly

         

        Ruti Margalit-Stashefski, Avraham Lorber, Eyal Margalit

         

        Family Practice Unit, Kupat Holim Klalit, Haifa, Pediatric Cardiology Unit, Rambam Hospital, Haifa and Ophthalmology Dept., Hadassah--University Hospital, Jerusalem

         

        Ebstein anomaly is a rare congenital disease which affects location, structure and mobility of the tricuspid valve, and right atrium and ventricle. Although most cases are sporadic, familial occurrence has been reported. We report 2 brothers born with Ebstein anomaly. The parents were first degree cousins and there were 8 other children. 2 daughters were born with other congenital heart anomalies, 1 with ventricular septal defect and the other with severe pulmonary artery stenosis. We suggest that in some families, Ebstein anomaly is an autosomal dominant disease with different expression in the sexes.

        אלברטו הנדלר ואורן אגרנט
        עמ'

        Emergency Stenting for Acute Left Main Coronary Artery Closure during Cardiac Catheterization

         

        Alberto Hendler, Oren Agranat

         

        Catheterization Laboratory, Rama Marpeh Hospital, Petah Tikva

         

        We report a case of acute closure of the left main coronary artery, a rare complication of diagnostic cardiac catheterization, treated by emergency stenting prior to aorto-coronary by-pass surgery. We suggest encroachment of the Judkins catheter into a calcified left main ostium, with dissection and acute thrombosis of this segment, as the possible mechanism.

        Clinically, the patient's condition deteriorated to cardiogenic shock and loss of consciousness. Remarkably, there was no angiographic evidence of significant left main coronary artery disease, besides the presence of calcification in the proximal part of the left coronary system and ventricularization of coronary pressure at the time of engagement. We chose to slide quickly the angioplasty guidewire through the left main coronary artery, which allowed prompt mechanical recanalization and rapid restoration of coronary flow, with dramatic clinical and hemodynamic improvement. This relatively simple procedure allowed stenting the left main artery after brief predilation, and the patient came to by-pass surgery in excellent condition. The rationale for surgery in this case was the need for complete coronary revascularization because of significant 3-vessel coronary artery disease.

        מרץ 1998

        קלאודיו קריסטל, יפתח שמש, יוסף מישעל ואברהם בורבין
        עמ'

        Cardiac Failure following Sting of Yellow Scorpion in an Adult

         

        C. Kristal, I.Y. Shemesh, Y. Mishal, A. Bourvin

         

        Intensive Care Unit, Dept. of Anesthesia and Medical Dept., Barzilai Medical Center, Ashkelon

         

        3 men, aged 18, 29, and 47 had severe cardiovascular disturbances following the sting of the yellow scorpion (Leiurus quinquestriatus hebraeus), which is considered the most dangerous scorpion in Israel. Cardiovascular complications are common in children after scorpion sting, but are rare in adults. Pulmonary edema developed in 1 of those being reported and hypertension and arrhythmias in the other 2. Severe deterioration in left ventricle function was confirmed by echocardiographic measurement of diminished ejection fraction. All patients recovered completely. This is the first report of severe cardiac involvement in adults following scorpion sting. We therefor recommend that even adults who develop cardiac symptoms after scorpion sting, particularly those with chronic cardiac disease, be monitored and treated in an intensive care unit.

        יוסף רוזנמן, חיים לוטן, הישאם נסאר ומרוין ש' גוטסמן
        עמ'

        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.

        יעקב גורביץ, יוסי פז, מנחם מצא, אמיר קרמר, דימיטרי פבני, אורן לב-רן, חיים לוקר ורפאל מור
        עמ'

        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.

        פברואר 1998

        עאיד מחאג'נה, דאוד שריף, בועז וולר, אדוארד אבינדר ובנימין שרף
        עמ'

        Diagnosis of Cerebral Embolism by Transesophageal Echocardiography

         

        A. Mahagney, D. Sharif, B. Weller, E. Abineder, B. Sharf

         

        Depts. of Neurology and Cardiology, Bnai Zion Hospital, Haifa

         

        Cerebrovascular events have high mortality and morbidity, especially in the elderly. Ischemia is the main cause and 30% of the ischemic events are embolic and of cardiac origin. The clinical picture is not always typical of the type of stroke, but diagnosis of the mechanism of the event determines treatment. Transesophageal echocardiography (TEE) is a sensitive procedure more appropriate for diagnosing emboli of cardiac origin than transthoracic echocardiography (TTE). We therefor compared TEE and TTE in the determination of the source of emboli in 65 patients with ischemic stroke but without significant atherosclerotic changes in their carotid arteries, and compared these findings with those in 50 patients without stroke. 68% of the patients had potential sources of emboli according to TEE, compared to only 15% according to TTE. In the control group only 24% had potential sources of emboli by TEE. The findings were: clots in the left atrium, severe aortic atheroma, patent foramen ovale with paradoxical shunt, spontaneous echocardiography contrast, vegetations and mitral valve prolapse. The study showed that TEE is better than TTE in detecting the etiology of embolic stroke in those with normal carotid arteries, thus determining appropriate management.

        ינואר 1998

        אהוד גולדהמר, ואדוארד אבינדר
        עמ'

        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.

        אוקטובר 1997

        אורה שובמן, יעקב ג'ורג' ויהודה שינפלד
        עמ'

        Q Fever Endocarditis and Bicuspid Aortic Valve

         

        Ora Shovman, Jacob George, Yehuda Shoenfeld

         

        Medial Dept. B and Autoimmune Disease Research Unit, Chaim Sheba Medical Center, Tel Hashomer and Sackler of Medicine, Tel Aviv University

         

        Q fever is caused by the rickettsia Coxiella burnetti, an obligate intracellular bacterium acquired by inhalation of infected dust from subclinically infected animals. Q fever may be acute or chronic; the chronic form mostly presents as endocarditis. Immunocompromised states and underlying heart disease are the most important risk factors. Usually the symptoms of Q fever endocarditis are nonspecific and diagnosis is often established very late. New criteria for diagnosis include a single blood culture positive for Coxiella burnetti, positive Q fever serology and characteristic echocardiographic studies. We describe a 49-year-old man with bicuspid aortic valve admitted with fever, weight loss and a new heart murmur. The diagnosis of Q fever endocarditis was established by positive Q fever serology, and an echocardiogram showing vegetations and valvular dysfunction. This case suggests that Q fever endocarditis should be considered in patients with "sterile" endocarditis.

        ספטמבר 1997

        ירון שפירא, רפאל הירש, רות יורטנר, משה ניל"י, ברנרדו וידנה, אליק שגיא
        עמ'

        Prosthetic Heart Valve Thrombosis: A 3-Year Experience

         

        Yaron Shapira, Rafael Hirsch, Ruth Jortner, Moshe Nili, Bernardo Vidne, Alex Sagie

         

        Sheingarten Echocardiography Unit and Cardiology Dept., Rabin Medical Center (Beilinson Campus), Petah Tikva and Sackler Faculty of Medicine, Tel Aviv University

         

        A series of 12 patients with 16 episodes of prosthetic heart-valve thrombosis over 3 years is presented. Most episodes affected mitral or tricuspid bileaflet prostheses. All patients were inadequately anticoagulated at the time of thrombosis. The clinical presentation was acute and severe in 6 patients, and subacute or chronic in the rest. Physical examination was suggestive of stuck valves in most cases. Transthoracic echocardiography revealed increased transvalvular gradients in most. However, clearer evidence of valve thrombosis was obtained from transesophageal echocardiography or fluoroscopy. 9 patients eventually had their valves re-replaced successfully, and the preoperative diagnosis was confirmed in all. 5 patients were operated as soon as the diagnosis was established, and an additional 4 were operated after failure of anticoagulation. In 4 patients the valve leaflets became completely mobile after a course of thrombolysis. Prosthetic valve thrombosis is a severe and potentially fatal complication in patients with mechanical heart valves. Alertness of physicians at all levels- the general practitioner, the internist and the cardiologist- to the possibility of valve thrombosis and to its clinical presentation may lead to prompt and earlier diagnosis and to comprehensive therapy.

        יולי 1997

        קרלוס כפרי, ראובן איליה ובנימין גולפרב
        עמ'

        Left Atrial Ball Thrombus

         

        Carlos Cafri, Reuben Ilia, Benjamin Goldfarb

         

        Cardiological Services, Soroka Medical Center and Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheba

         

        An 80-year-old hypertensive woman with chronic atrial fibrillation was hospitalized because of recurrent syncope. Echocardiography revealed a large left atrial ball thrombus. Operative findings confirmed the echocardiographic diagnosis.

        מרץ 1997

        נחום נשר, אלון ארז, דורון נצר, רנטו פנקלשטיין וירון בר-אל
        עמ'

        Acute Fungal Endocarditis Due To Trichosporon Beigelli

         

        Nahum Nesher, Alon Erez, Doron Nezer, R. Finkelstein, Y. Barel

         

        Dept. of Cardiac Surgery, Rambam Medical Center, Haifa and Technion Faculty of Medicine

         

        We report a 59-year-old woman with acute fungal endocarditis of a prosthetic valve caused by the endogenic organism, Trichosporon beigelli. This slowly developing disease mainly effects drug addicts who use intravenous narcotics. In nonaddicts it is rare, with mortality as high as 50%. There are only sporadic reports of T. beigelli as a complication long after open heart surgery. The ongoing infection is undetected for even several years after the primary infection, due to its prolonged latent phase. We present the difficulties of diagnosis, and of treating the disease with a combination of surgery and of long-term chemotherapy.

        הבהרה משפטית: כל נושא המופיע באתר זה נועד להשכלה בלבד ואין לראות בו ייעוץ רפואי או משפטי. אין הר"י אחראית לתוכן המתפרסם באתר זה ולכל נזק שעלול להיגרם. כל הזכויות על המידע באתר שייכות להסתדרות הרפואית בישראל. מדיניות פרטיות
        כתובתנו: ז'בוטינסקי 35 רמת גן, בניין התאומים 2 קומות 10-11, ת.ד. 3566, מיקוד 5213604. טלפון: 03-6100444, פקס: 03-5753303