Mitral Valve Repair in Ischemic Cardiomyopathy with Severeleft Ventricular Dysfunction

Dani Bitran, Ofer Merin, Jeffrey Fisher, Nadiv Shapira, Marc W. Klutstein, Shuli Silberman

Depts. of Cardiothoracic Surgery, Anesthesiology and Cardiology, Shaare Zedek Medical Center, Jerusalem

Patients with ischemic mitral insufficiency and poor left ventricular function are high operative risks. We present 101 patients who had mitral valve repair in our department: 21 had severely reduced left ventricular function, 19 were in NYHA functional Class IV, and 2 in Class III. All had concomitant coronary artery bypass.

There was no early operative mortality, but there were 2 late deaths (9.6%). At follow-up (3-36 months) all valves were functioning normally, 9 patients (43%) were in NYHA functional Class I, and 4 (19%) in Class II.

Our experience shows that repair of ischemic mitral insufficiency in the presence of severe left ventricular dysfunction can be performed with good results, and is preferable to mitral valve replacement. Late follow-up showed significant symptomatic improvement.

Use of Civilian Emergency Departments by Israel Defense Force Soldiers 

A.D. Cohen, A. Porath, R. Bessorai, A. Shulman, Y. Snir

Medical Corps, Israel Defense Forces; Depts. of Medicine F and Orthopedics and Emergency Dept., Soroka University Medical Center and Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheba

Many physicians, civilian as well as in military, feel that some referrals of soldiers to civilian emergency departments are inappropriate and that soldiers should receive medical attention within their military units. We therefore evaluated referrals of soldiers to our emergency department.

707 referral letters from military physicians and the corresponding emergency room discharge letters were evaluated. Most soldiers were referred for mild trauma (45.0%) or miscellaneous diseases (52.9%); 22 (3.1%) were hospitalized.

It appears that some military physicians use the civilian hospital emergency department as a surrogate for an out-patient specialty clinic and for x-ray and laboratory services. This is in contrast to the designated functions of the emergency department which are to provide emergency and trauma services and to evaluate the need for hospitalization of referred patients.

Jet Lag Causing or Exacerbating Psychiatric Disorders

Gregory Katz, Rimona Durst, Josef Zislin, Hilla Knobler, Haim Y. Knobler

Kfar Shaul Mental Health Center, Jerusalem (Affiliated with the Hebrew University-Hadassah Medical School, Jerusalem)

Desynchronization of circadian rhythmicity resulting from rapid travel through at least 4 time zones leads to symptoms of jet lag syndrome. The most commonly experienced symptoms in normal individuals are sleep disorders, difficulties with concentrating, irritability, mild depression, fatigue, and gastrointestinal disturbances.

There is strong evidence relating affective disorders to circadian rhythm abnormalities, such as occur in jet lag. Less convincing suggestions relate jet lag to psychosis. We presume, relying on the literature and our accumulated experience, that in predisposed individuals jet lag may play a role in triggering exacerbation of, or de novo affective disorders, as well as, though less convincing, schizophreniform psychosis or even schizophrenia. An illustrative case vignette exemplifies the possible relationship between jet lag following eastbound flight and psychotic manifestations.

New Psychopharmacological Approaches in Mental Health as Applied by the Israel Defense Forces

Moshe Zvi Abramowitz, M. Shmushkevich, Avraham Weizman, Mordechai Mark

Mental Health Department, Medical Corps, Israel Defense Forces; Sackler Faculty of Medicine, Tel Aviv University; Jerusalem Mental Health Center; and Geha Psychiatric Hospital

In the past decade there have been far-reaching developments in psychopharmacology. Previously, only a few classes of medication were at the disposal of psychiatrists, as many had serious side effects that limited their use. Now our psychopharmacological armamentarium has grown considerably, allowing for greater choice of treatment in the military.

We review these developments, and discuss the special considerations to be taken into account when treating soldiers with psychiatric medication. We discuss suitable medication for ongoing outpatient treatment, as well as the standard list of medication currently used by units deployed in the field.

Advances in psychopharmacologic treatment should enable more soldiers to serve safely in the military with fewer restrictions on their duties.

Man in a Hot Climate - Early Studies of the Institute of Military Physiology 

Ezra Sohar, Yair Shapiro, Yoram Epstein

Institute of Military Medicine, Medical Corps, Israel Defense Forces and Heller Institute of Medical Research, Sheba Medical Center, Tel Hashomer

In the 1950's many IDF soldiers were hospitalized for heat stroke - about 25% of whom died. Analyzing these cases revealed that commanders misinterpreted human ability to perform in the heat and ignored basic concepts of fluid and electrolyte balance and heat load.

In the early 1960's a series of studies was conducted with regard to soldiers' performance in the heat. The first study (1959), which later became a classic, was conducted during a 21-day march from Eilat to Metula, crossing all climatic zones of Israel. The study was followed by other investigations which approached the issues of voluntary dehydration, fluid consumption vs sweat loss, salt additives, and the effect of heat load on performance.

Based on these early studies, proper regulations were issued to field officers. Over the years, the lessons learned from these studies saved many lives. The number of cases of heat stroke and of other climate-related injuries was dramatically reduced, and performance was enhanced.

Pre-Induction Sport Activity in Prevention of Stress Fractures 

Aharon S. Finestone, Arieh Eldad, Charles Milgrom

Medical Corps, Israel Defense Forces, and Dept. of Orthopedics, Rabin Medical Center, Beilinson Campus, Petah Tikva and Hadassah University Hospital, Ein Kerem, Jerusalem

Pre-induction sports participation of 392 elite infantry recruits was evaluated for correlation with incidence of stress fractures (SF) during 14 weeks of basic training. 23.7% developed lower extremity stress fractures. 72% of the recruits had participated in sports on a regular basis during the 2 years prior to induction. Their fitness as examined by the Bar-Or induction fitness test, was significantly better than that of those who had not trained. 14.9% of the soldiers who had previously participated in ball games (primarily basketball) as an only sport suffered stress fractures, compared to 31.0% of those whose only sport was running (p<0.005).

Training for only 6 months prior to induction had no effect on the incidence of SF. The reason for the difference between ball games and running is probably related to the higher strains and strain rates developed during ball games and to their multidirectional nature, as compared to running.

These findings suggest that participation in a pre-induction program that includes activities that create strains, such as basketball, can reduce incidence of SF in infantry recruits. The training period has to last at least 2 years.

Prediction of Physiological Response from Mathematical Models 

Yoram Epstein, Yuval Heled, Daniel Moran, Yair Shapiro

Institute of Military Medicine, Medical Corps, Israel Defense Forces and Heller Institute of Medical Research, Sheba Medical Center, Tel Hashomer

The ability to predict the physiological responses of workers exposed to extreme environmental conditions, has been a challenge to environmental physiologists for more than 3 decades. Therefore, mathematical models have been developed to predict metabolic rate under various levels of work intensity and dynamic changes in body temperature and heart rate.

Based on the effect of exercise on the cardiovascular system, a model was developed to predict mean arterial blood pressure as a function of heart rate. Physiological strain could also be estimated on the basis of thermoregulatory and cardiovascular strains.

This paper summarizes knowledge accumulated during 25 years of studies in the field of mathematical modeling of physiological parameters. Besides analyzing the logic underlying each model, it explains the scientific approach in developing a model from its early concept to the model's application in the field.

Preflight Assessment by Hypoxic Inhalation Test in Cardio-Pulmonary Patients 

J. Lebzelter, G. Fink, E. Kleinman, I. Rosenberg, M.R. Kramer

Pulmonology Institute, Rabin Medical Center, Beilinson Campus, Petah Tikva

Flying may expose passengers to hypoxic conditions, which may induce hypoxemia, particularly in those with chronic heart and/or lung disease. Onset of dyspnea, wheezing, chest pain, cyanosis and right heart failure can lead to urgent need for oxygen during flight. The hypoxia inhalation test (HIT) provides a safe and simple means of identifying those who may develop hypoxemia during flight.

We report our experience with 48 self-reporting patients who underwent HIT prior to pre-planned air travel. They inhaled for 15-minute periods a reduced oxygen concentration (F₁O₂ 15%) under normobaric conditions, during which O₂ saturation was monitored by pulse oximeter; electrocardiogram, blood pressure and symptoms were also monitored. O₂ saturation of 85% (PaO₂ 50 mm Hg) was considered a positive test. In the 8 cases (17%) with a positive test, 5 had chronic obstructive pulmonary disease and 3 had cardiovascular and/or combined heart-lung disease.

We calculated predicted O₂ partial pressure in altitude (PaO₂ ALT) and compared it to actual results in the 8 patients with a positive HIT. In 5, use of the predicted formula would have under-diagnosed the hypoxemia that developed during the HIT. Thus, the results of the HIT changed treatment strategy in these patients. We recommend that patients with positive tests use O₂ (2LPM or 4LPM) during flight.

HIT is practical and of potential benefit in the objective assessment of patients with various degrees of heart, lung or combined heart-lung disease. Clinicians should be aware of the relative risk of hypoxia during flight in such patients, and of the value of HIT in identifying them, leading to increase in its use.

Ethnicity and Emergency Department Visits in the Negev

Shahar Livnat, Eyal Almog, Gad Rabinowitch, Yoram Snir

Dept. of Emergency Medicine, Soroka University Medical Center and Dept. of Industrial Engineering and Management, Ben-Gurion University of the Negev, Beer Sheba

The population of the Negev consists mainly of Jews and Bedouin, who have very different life styles. Patients of both ethnic groups use our emergency department exclusively, providing a unique opportunity to study comparative patient habits.

In gathering and processing the information we used Data Mining technology, which allows search for unique patterns in large data bases. We examined demographic data on some 64,000 emergency department visits during 1997-8, mostly medical and surgical cases, but not trauma cases. Many more were by Bedouin than Jews, and between the ages of 25 and 44, more by women than men. There were changes in trends in comparison with an arrival survey conducted some 11 years before.

Non-Penetrating Deep Sclerectomy without Collagen Implantfor Glaucoma

Ben Zion Silverstone, Isaac Aizenman, Carmit Landau, Yaacov Rozenman

Ophthalmology Dept., Shaare Zedek Medical Center, Jerusalem

Deep sclerectomy (DS) can be used in glaucoma with increased intraocular pressure when medical treatment fails. It involves removing part of the ocular drainage apparatus. Resistance to intraocular fluid drainage is decreased, improving drainage and decreasing intraocular pressure. By avoiding anterior chamber penetration, DS diminishes frequency of the complications of filtering surgery.

24 eyes of 23 patients underwent DS for primary or secondary open angle glaucoma with elevated intraocular pressure not controlled medically. It included preparation of a 4.0 x 4.0 mm limbal-based external scleral flap, dissecting and removing most of an internal scleral flap (leaving it 1 mm smaller than the external flap), unroofing Schlemm's canal and removing fine endothelial tissue lining its inner walls. The external scleral flap was then repositioned and sutured. Collagen implants were not used. In some cases DS was combined with extracapsular cataract extraction and intra-ocular lens implantation.

Mean intraocular pressure decreased from 24.8‏3.9 mmHg initially to 12.8‏4.4 mmHg 6 months after operation (p<0.0001). There was no difference in postoperative intra-ocular pressure between DS as a single procedure or as part of a combined operation. Comations were mild and of short duration.

If long-term follow-up shows that lowered intraocular pressures are maintained, DS should be a surgical option in earlier stages of glaucoma.

Presurgical Neuropsychological assessment in Epilepsy: The Wada Test

Fani Andelman, Miri Neufeld, Irith Reider-Groswasser, Uri Kremer, Yoram Segev, Itzhak Fried

Functional Neurosurgery and EEG and Epilepsy Units, Section of Neuroradiology; and Pediatric Neurology Unit; Tel Aviv-Sourasky Medical Center, Tel Aviv

37 candidates for epilepsy surgery underwent the intra-carotid amytal procedure (IAP; also known as the Wada test) to determine hemispheric speech dominance and memory capacity. 31 demonstrated left hemisphere speech dominance, 2 showed evidence for bilateral language and 4 demonstrated right hemispheric language dominance.

Our study supports a correlational relationship between handedness, lesion laterality and age of onset of seizures, as reported in earlier studies. Left-handed patients with a left hemisphere lesion whose seizures began to an early age had a strong tendency for reversed language dominance.

Asymmetry of at least 20% in performing the memory test was taken as the cutoff score for demonstrating laterality of lesions. The asymmetry score correctly predicted laterality of lesions in all 28 patients; 6 did not have asymmetry scores and 3 were examined for language only. None of the patients who successfully passed the Wada memory test had any significant postsurgical memory deficits; 1 had transient reduction in verbal memory and 4 who did not pass the test were not operated on for this reason.

Our results demonstrate the importance of the Wada test in determining cerebral speech dominance, in predicting post-surgical amnesia, and support its usefulness in predicting laterality of seizure focus in candidates for temporal lobectomy.

High Dose Endobronchial Brachy - Therapy for Malignant Airway Obstruction

Alex Yarmolovsky, Alan Katz, Eyal Fenig, G. Fink, Daniel Bendayan, Aaron Sulkes, Mordechai R. Kramer

Institutes of Pulmonology and Oncology, Rabin Medical Center, Beilinson Campus, Petah Tikva, and Sackler Faculty of Medicine, Tel Aviv University

Brachytherapy is especially suitable for palliative treatment of endobronchial tumors adjacent to internal organs that might be damaged by intensive external beam radiation, but are easily accessed with a flexible bronchoscope. This treatment is mostly palliative.

30 patients underwent such palliative high-dose endobronchial brachytherapy to alleviate malignant airway obstruction. With the aid of a flexible fiberoptic bronchoscope an endobronchial catheter was inserted adjacent to the tumor and treatment delivered using a 192Ir remote afterloader for 5-10 min, in 2 or 3 sessions.

There was symptomatic improvement in 26 (86%) and objective improvement in 27 (90%). 1 patient died of hemoptysis.

Phenobarbital Coma for Psychogenic Status Epilepticus

A. Taliansky, U. Kramer, M.Y. Neufeld

EEG and Epilepsy Unit, Dept. of Neurology and Neuropediatric Unit, Tel Aviv-Sourasky Medical Center

Among patients seen for epileptic seizures, there is a subgroup of those who do not have epilepsy but suffer from psychogenic paroxysmal events which mimic epileptic seizures. The differential diagnosis between them is of the utmost importance, as incorrect diagnosis of seizures subjects the patient to incorrect management. In the case psychogenic status epilepticus, the treatment may endanger the patient.

We report 3 women, aged 20, 20 and 28 and a man aged 24 with psychogenic status epilepticus admitted to an intensive care unit and treated by induction of phenobarbital coma when other antiepileptic medication failed.

Causes of Blindness in Israel 

Y. Hod, Y. Corcia, Y. Yassur, O. Geyer

Depts. of Ophthalmology, Carmel Medical Center, Haifa and Rabin Medical Center, Petah Tikva; Israel Ministry of Labor and Social Affairs, Jerusalem; and Rehabilitation Services Administration, Services for the Blind

Of the world population, 38 million are blind and another 110 million are visually impaired. Even in the developed countries there are 3.5 million who are blind.

This study of blindness in Israel is based on the National Blind Registry. At the end of 1998, 15,937 were registered as blind, 0.3% of the total population; 776 (5%) of them were 18 years old or younger; 6,426 (40%) 18-65 years old; and 8,735 (55%) 65 years or older.

The leading causes of blindness in Israel are glaucoma (2,074, 13%), macular degeneration (1,954, 12%) and diabetes mellitus (1,680, 11%). Since glaucoma and diabetes, and to a lesser extent glaucoma, respond to treatment, blindness could have been avoided in most cases. National screening programs for early diagnosis and treatment of these diseases would reduce prevalence of the newly blind.

Emergency Cesarean Section in a Comatose Parturient after Head Trauma 

R. Aviram, A. Shtraizent, Yoram Beyth, M. Fejgin

Ultrasound Division and High Risk Unit, Dept. of Obstetrics and Gynecology, Meir Hospital, Sapir Medical Center, Kfar Saba (Affiliated with the Sackler School of Medicine) and Neurosurgery Dept.,Rabin Medical Center, Petah Tikva)

Coma in pregnancy and labor is a rare and complicated situation. One of the causes is severe head trauma, which requires neurosurgical consultation and possibly urgent transfer to a neurosurgical unit. This should follow stabilization, confirmation of fetal viability, and cesarian section when indicated.

A 38-year-old primigravida at term and in labor, with severe head injury from a vehicular accident is reported. Emergency cesarean section was performed for severe fetal distress during resuscitation. Fetal distress in a comatose parturient with severe head injury may require a short delay in referral to a tertiary trauma center to allow for an emergency cesarean section.