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עמוד בית
Sat, 23.11.24

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November 2006
R. Hirsch and J.Y. Streifler
 Congenital heart disease is usually regarded as an esoteric field of medicine, dealt with primarily by dedicated specialists. However, over the last two decades a much broader attention has been given by the medical profession, the media and the general public, to the possible association between a minor and common congenital heart defect, namely a patent foramen ovale, and stroke. In recent months, unusual and unfortunate circumstances have made this topic one of the most fiercely debated medical issues in Israel. It is the belief of the authors of this paper that the association of PFO[1] and stroke can be better understood if the PFO is viewed as part of a broader aspect of congenital heart disease, and as such it will be presented. Paradoxical embolism is a mechanism of stroke unique to congenital heart disease. The direction and volume of shunted blood in various conditions have a central role in determining the risk of stroke, as will be explained. With this basic knowledge in mind, we shall critically assess the potential role of PFO in stroke patients, suggesting that each case be evaluated individually using the above-mentioned principles. Conditions that enhance the formation of clot or other embolic material will be discussed briefly. The review will conclude with the various treatment options and our center's own experience with this challenging topic.







[1] PFO = patent foramen ovale


D. Soffer
 Cerebral amyloid angiopathy is characterized by deposition of amyloid in the walls of leptomeninged and cerebral blood vessels. Its most common form, sporadic CAA[1] that results from deposition of β-amyloid peptide, which is the subject of this short review, is present in virtually all cases of Alzheimer diseases and is also common among non-demented subjects where its prevalence increases with age. Stroke due to massive cerebral lobar hemorrhage is the main clinical presentation of CAA, but transient neurologic symptoms due to microhemorrhages may also occur. CAA is also a risk factor for cerebral infarction and there is increasing evidence that CAA contributes to cognitive impairment in the elderly, usually in association with white matter abnormalities on imaging. Although the definitive diagnosis of CAA is neuropathologic, reliable diagnosis can be reached clinically, based on the occurrence of strictly lobar hemorrhages, particularly in the cortico-subcortical area when using gradient-echo or T2*-weighted magnetic resonance imaging. Experimental studies have shown that the origin of the vascular amyloid is neuronal, and age-related degenerative changes in the vessel walls prevent its clearance from the brain along perivascular spaces and promote Aβ[2] aggregation and CAA formation. The entrapped Aβ aggregetes are toxic to various vascular wall components, including smooth muscle cells, pericytes and endothelial cells, leading to their eventual destruction and predisposition of the vessel wall to rupture and hemorrhage. However, more research is necessary to decipher the mechanism of CAA formation and its relation to cognitive decline in the elderly.







[1] CAA = cerebral amyloid angiopathy

[2] Aβ = β-amyloid peptide


October 2006
S. Linden
 Approximately 60% of all worldwide deaths are caused by chronic disease resulting from modifiable health behaviors. In the United States, structured programs tailored to identify and modify health behaviors of patients with chronic illness have grown into a robust industry called disease management. DM[1] is premised upon the basic assumption that health services utilization and morbidity can be reduced for those with chronic illness by augmenting traditional episodic medical care services and support between physician visits. Given that Israel and the U.S. have similar demographics in their chronically ill populations, it would make intuitive sense for Israel to replicate efforts made in the U.S. to incorporate DM strategies. This paper provides a conceptual framework of how DM could be integrated within the current organizational structure of the Israeli healthcare system, which is uniquely conducive to the implementation of DM on a population-wide basis. While ultimately the decision to invest in DM lies with stakeholders at various institutional levels in Israel, this paper is intended to provide direction and support for that decision-making process.







[1] DM = disease management


September 2006
M. Ben-Haim, M. Carmiel, P. Katz, E. Shabtai, R. Oren and R. Nakache

Background: The model for end-stage liver disease is the best available predictor of waiting list mortality among liver transplant candidates.

Objectives: To validate the applicability of MELD[1] in Israel.

Methods: All candidates awaiting liver transplantation in our institution were followed prospectively since 2002. We measured the concordance (c-statistic) equivalent to the area under the receiver operating characteristic curve in order to assess the predictive power of MELD. Other independent mortality risk factors were identified by a separate multivariate analysis. Mortality rates within different MELD and Child‑Pugh‑Turcotte scores were compared to the original (United States) MELD data.

Results: Of 86 patients listed for transplantation, 40 were transplanted (36 in Israel and 4 abroad). Of the other 46 patients, 24 are alive and still listed, and 22 died (25%, ~7%/year). The area under the ROC[2] curve for MELD score was 0.79 (0.83 USA) compared to a CPT[3] score of 0.71 (O.76 USA). High MELD scores, occurrence of spontaneous bacterial peritonitis, and diagnosis of hepatocellular carcinoma were independent risk factors of mortality. Death rates per mid MELD score (20–29) were significantly higher than the USA results.

Conclusions: MELD is valid in Israel and superior to CPT in predicting waiting list mortality. Although longer waiting time due to organ scarcity is a key factor, death rates in the mid-range (10–29) MELD groups indicate further audit of the care of patients with end‑stage liver disease.






[1] MELD = model for end-stage liver disease



[2] ROC = receiver operating characteristic



[3] CPT = Child‑Pugh‑Turcotte


R. Elazary, M. Bala, G. Almogy, A. Khalaileh, D. Kisselgoff, M. Rav-Acha, A.I. Rivkind and Y Mintz
August 2006
D. Tekes-Manova, E. Israeli, T. Shochat, M. Swartzon, S. Gordon, R. Heruti, I. Ashkenazi and D. Justo
 Background: Coronary heart disease is a major cause of morbidity and mortality worldwide. Early detection of cardiovascular risk factors and intervention may reduce consequential morbidity and mortality.

Objectives: To assess the prevalence of reversible and treatable cardiovascular risk factors among 26’477 healthy Israeli adults: 23’339 men and 3138 women aged 25-55 years.

Methods: We collected data during routine examinations performed as part of a screening program for Israel Defense Force personnel.


Results: The three most prevalent cardiovascular risk factors were a sedentary lifestyle (64%), dyslipidemia (55.1%) and smoking (26.8%). Overall, 52.9% of the men and 48.4% of the women had two or more cardiovascular risk factors. Moreover, 52.4% of young adult men and 43.3% of young adult women, age 25-34 years, had two or more reversible cardiovascular risk factors.


Conclusions: In this expectedly healthy population there was a high prevalence of reversible and treatable cardiovascular risk factors in both genders and in young age. These observations stress the need for routine health examinations and lifestyle modification programs even in the young healthy Israeli population.

E. Leibovitz, Y. Gerber, M. Maislos, E. Wolfovitz, T. Chajek-Shaul, E. Leitersdorf, U. Goldbourt and D. Harats for the HOLEM study group
 Background: Obesity is an independent risk factor for ischemic heart disease and affects the status of other risk factors for cardiovascular disease.

Objective: To study the attitude of physicians to obesity by examining discharge letters of overweight patients with ischemic heart disease.

Methods: We used the HOLEM database for this analysis. The HOLEM project was designed to study the NCEP (National Cholesterol Education Program) guideline implementation among patients with IHD[1] at hospital discharge. We documented the recording of risk factors and treatment recommendations for IHD by reviewing the discharge letters of 2994 IHD patients admitted to four central hospitals in Israel between 1998 and 2000. A follow-up visit was held 6–8 weeks after discharge, at which time the diagnosis of IHD was verified, risk factor status was checked, height and weight were measured and drug treatment was reviewed.

Results: Mean body mass index was 28.3 kg/m2 and 32% were obese (BMI[2] ³ 30 kg/m2). Only 39.6% of the obese patients and 65.8% of the morbidly obese patients (BMI ³ 40 kg/m2) had "obesity" noted in their discharging letters, and weight loss recommendation was written in only 15% of the obese patients' discharge letters. Acute episodes like acute myocardial infarction and unstable angina did not influence the notation of obesity, and only BMI and the number of additional risk factors were positively correlated with the notation of this risk factor.

Conclusions: Despite the importance of obesity, weight status was not noted and weight loss was not recommended in most of the discharge letters of obese IHD patients.


 





[1] IHD = ischemic heart disease

[2] BMI = body mass index


I. Hartmann, K. Weiss, T. Bistritzer, S. Baram and M. Goldman
E. Reinstein and Y. Shoenfeld
July 2006
D. Starobin, M.R. Kramer, A. Yarmolovsky, D. Bendayan, I. Rosenberg, J. Sulkes and G. Fink
 Background: Different exercise tests are used to evaluate the functional capacity in chronic obstructive pulmonary disease. The cardiopulmonary exercise test is considered the gold standard, but the 6 minute walk and the 15 step exercise oximetry tests are considerably less expensive.

Objectives: To determine whether reliable data could be obtained at lower cost.

Methods: The study sample consisted of 50 patients with mild to severe stable COPD]1[. All underwent pulmonary function test and the cardiopulmonary exercise test, 6 minute walk and 15 step exercise oximetry test as part of their regular follow-up visit. Functional capacity was graded according to each test separately and the functional capacities obtained were correlated.

Results: The results showed that most of the patients had severe COPD according to pulmonary function tests (mean forced expiratory volume in the first second 46.3 ± 19.9% of predicted value). There was a good correlation between the cardiopulmonary exercise test and the 6 minute walk functional capacity classes (r = 0.44, P = 0.0013). We did not find such correlation between the 15 step exercise oximetry test and the cardiopulmonary exercise test (r = 0.07, P = 0.64).

Conclusions: The study shows that the 6 minute walk is a reliable and accurate test in the evaluation of functional capacity in COPD patients.


 





[1] COPD = chronic obstructive pulmonary disease


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