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עמוד בית
Sat, 20.04.24

Search results

March 2022
Israel Mazin MD, Ori Vaturi MD, Rafael Kuperstein MD, Roy Beigel MD, Micha Feinberg MD, and Sagit Ben Zekry MD

Background: Estimated frequency of aortic stenosis (AS) in those over 75 years of age is 3.4%. Symptomatic patients with severe AS have increased morbidity and mortality and aortic valve replacement should be offered to improve life expectancy and quality of life.

Objectives: To identify whether systolic time intervals can identify severe AS.

Methods: The study comprised 200 patients (mean age 79 years, 55% men). Patients were equally divided into normal, mild, moderate, or severe AS. All patients had normal ejection fraction. Acceleration time (AT) was defined as the time from the beginning of systolic flow to maximal velocity; ejection time (ET) was the time from onset to end of systolic flow. The relation of AT/ET was calculated. Death or aortic valve intervention were documented.

AT increased linearly with the severity of AS, similar to ET and AT/ET ratio (P for trend < 0.05 for all). Receiver-operator characteristic curve analysis demonstrated that AT can identify severe AS with a cutoff ≥ 108 msec with 100% sensitivity and 98% specificity, while a cutoff of 0.34 when using AT/ET ratio can identify severe AS with 96% sensitivity and 94% specificity. Multivariate analysis adjusting to sex, stroke volume index, heart rate, and body mass index showed similar results. Kaplan-Meier curve for AT ≥ 108 and AT/ET ≥ 0.34 predicted death or aortic valve intervention in a 3-year follow-up.

Conclusions: Acceleration time and AT/ET ratio are reliable measurements for identifying patients with severe AS. Furthermore, AT and AT/ET were able to predict aortic valve replacement or death

August 2019
Marina Leitman MD, Yan Topilsky MD, Vladimir Tyomkin MSc, Shemy Carasso MD, Sara Shimoni MD, Sorel Goland MD, Sagit Ben Zekry MD, Alik Sagie MD, Noah Liel Cohen MD, Chaim Yosefy MD and Rоnen Beeri MD

The output settings of echocardiographic systems should be set to the full (original) frame rate and lossless compression (e.g., run-length encoding) in order to transmit echocardiographic videos so that they retain their original quality. In addition, monitors and display cards of echocardiography systems and workstations should be able to support an adaptive refresh rate for displaying video at an arbitrary frame rate, including a high frame rate (90+ fps) without dropping frames and preserving the original frame duration. Currently, the only available option for echocardiography monitors is 144–165 Hz (or higher) based on adaptive frame rate G-Sync or FreeSync technology monitors. These monitors should be accompanied by compatible display cards. Echocardiography systems and workstation video playback software should support G-Sync or FreeSync adaptive frame rate technology to display echocardiography videos at their original frame rates without the effects of jitter and frame drops. Echocardiography systems should support an online display of the videos on the workstations during acquisition with the original quality. The requirements for web-based workstations are the same as for desktops workstations. Hospital digital networks should provide transmission and long-term archiving of the echocardiographic videos in their original acquisition quality.

February 2019
Olga Perelshtein Brezinov MD, Michal J. Simchen MD, Sagit Ben Zekry MD and Rafael Kuperstein MD

Background: Rheumatic mitral stenosis (MS) is a relatively rare diagnosis in the developed countries and its treatment during pregnancy is challenging due to hemodynamic changes. With the demographic changes due to recent waves of immigration an increase in the prevalence of rheumatic heart disease is expected.

Objective: To evaluate maternal and neonatal complications in patients with mitral stenosis.

Methods: During the years 2006–2017, 22 women who underwent 31 pregnancies were followed at the Sheba Medical Center in Israel. We collected on regarding hemodynamic changes and their clinical course. MS was classified as mild, moderate, or severe according to mitral valve area by echocardiography. Maternal and fetal adverse events were evaluated according to severity of MS and compared by Poisson regression modeling.

Results: MS was severe in 7 pregnancies (22.6%), moderate in 9 (29%), and mild in 15 (48.4%). Twenty patients were managed conservatively and 2 underwent a successful percutaneous mitral balloon valvuloplasty (PBMVP) during pregnancy. All pregnancies ended with a liveborn neonate and with no maternal mortality. Peak and mean mitral pressure gradients increased during pregnancy from 13.3 ± 5.3 to 18.6 ± 5.1 mmHg and from 5.9 ± 2.3 to 9.6 ± 3.4 mmHg respectively (P < 0.05). Eight pregnancies (25.8%) were complicated by pulmonary congestion, 2/15 (13.3%) with mild MS, 2/9 (22.2%) with moderate, and 4/7 (57.1%) with severe MS. The adverse event rate was higher among patients with severe MS compared with moderate and mild MS [hazard ratio (HR) 3.15, 95% confidence interval (95%CA) 1.04–9.52 and HR 4.06, 95%CI 1.4–11.19 respectively, P < 0.05]. Nine of 31 deliveries were vaginal; 6 of 22 cesarean sections (27.3%) were performed for cardiac indications.

Conclusions: The number of total adverse events were higher among patients with severe MS. Patients with moderate and mild MS should be treated attentively, but good obstetric and maternal outcome can be expected.


July 2018
Eilon Ram MD, Leonid Sternik MD, Alexander Lipey MD, Sagit Ben Zekry MD, Ronny Ben-Avi MD, Yaron Moshkovitz MD and Ehud Raanani MD

Background: Unicuspid and bicuspid aortic valve (BAV) are congenital cardiac anomalies associated with valvular dysfunction and aortopathies occurring at a young age.

Objectives: To evaluate our experience with aortic valve repair (AVr) in patients with bicuspid or unicuspid aortic valves.

Methods: Eighty patients with BAV or unicuspid aortic valve (UAV) underwent AVr. Mean patient age was 42 ± 14 years and 94% were male. Surgical technique included: aortic root replacement with or without cusp repair in 43 patients (53%), replacement of the ascending aorta at the height of the sino-tubular junction with or without cusp repair in 15 patients (19%), and isolated cusp repair in 22 patients (28%).

Results: The anatomical structure of the aortic valve was bicuspid in 68 (85%) and unicuspid in 12 patients (15%). Survival rate was 100% at 5 years of follow-up. Eleven patients (13.7%) underwent reoperation, 8 of whom presented with recurrent symptomatic aortic insufficiency (AI). Late echocardiography in the remaining 69 patients revealed mild AI in 63 patients, moderate recurrent AI in 4, and severe recurrent AI in 2. Relief from recurrent severe AI or reoperations was significantly lower in patients who underwent cusp repair compared with those who did not (P = 0.05). Furthermore, the use of pericardial patch augmentation for the repair was a predictor for recurrence (P = 0.05).

Conclusions: AVr in patients with BAV or UAV is a safe procedure with low morbidity and mortality rates. The use of a pericardial patch augmentation was associated with higher repair failure.

August 2017
Liron Hofstetter MD, Sagit Ben Zekry MD, Naama Pelz-Sinvani MD, Michael Kogan MD, Vladislav Litachevsky MD, Avi Sabbag MD and Gad Segal MD
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