Mohamed Elbayomi

Dr. Mohamed Elbayomi


Research Focus & Metrics

Academic Career Length

5Years (2022-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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24 August 2022 in The Thoracic and Cardiovascular Surgeon Reports
Verified
Journal Article
Open access
PDF file
MEMohamed Elbayomi
Mohamed Elbayomi
ENEhab Nooh
Ehab Nooh
MWMichael Weyand
Michael Weyand
Abbas AgaimyAbbas Agaimy
Abbas Agaimy
FHFrank Harig
Frank Harig
An 83-year-old woman presented with a new onset of dyspnea and dysphonia. Physical examination revealed no abnormalities. Computerized tomography, bidimensional echocardiography, and cardiac magnetic resonance confirmed the presence of a cardiac mass in the left atrium. Surgical resection was uneventful and showed the origin of the mass in the ostium of the left inferior pulmonary vein. Histological evaluation revealed undifferentiated pleomorphic sarcoma with myxoid features. This case highlights the importance of considering cardiac neoplasms as a rare differential diagnosis, including rare and misleading clinical presentations.

4 February 2025 in Annals of Medicine
Verified
Journal Article
Open access
MEMohamed Elbayomi
Mohamed Elbayomi
ODOliver Dewald
Oliver Dewald
PPPresheet Pathare
Presheet Pathare
MKMarkus Kondruweit
Markus Kondruweit
RTRene Tandler
Rene Tandler
CHChristian Heim
Christian Heim
Vasoplegic syndrome is associated with high mortality. Methylene blue (MB) is a guanylate cyclase inhibitor that ameliorates this re-distributive type of shock. This study aims to investigate the outcome in patients who received MB early postoperatively. 2753 patients who underwent cardiac surgery utilizing cardiopulmonary bypass at our institution in a time interval of two years were identified. The incidence of vasoplegic syndrome was 7.2% (n = 200). Pharmacy records identified 84 patients (group 1, MB group) who received methylene blue and 116 patients (group 2, Control group) who didn't receive the drug. This single-center retrospective cohort study's primary outcome was in-hospital mortality. Secondary outcomes were postoperative hemodialysis, serum lactate levels at 24 h postoperatively, and intensive care unit stay length in days. MB patients have a shorter ICU stay as compared to the control group (9 ± 8 days vs. 16 ± 6.9; p-value <.001). In the control group, postoperative hemodialysis was higher (20% in the MB group and 40% in the control group; p-value <.05). At 24 h post-op, the methylene blue group had reduced serum lactate levels (1.8 ± 1.2 vs. 4 ± 1.8 in the control group; p-value <.001). The methylene blue group had a decreased 24-hour norepinephrine dose (1.5 ± 1.2 vs. 2.8 ± 2 in the control group; p-value <.05). In-hospital mortality was not significantly different between the two groups (38% in the MB group vs. 43% in the control group). Early postoperative administration of methylene blue in patients with vasoplegic syndrome shortens intensive care unit stay and contributes to less end-organ damage.

2 March 2023 in The Heart Surgery Forum
Verified
Journal Article
Closed access
PDF file
MEMohamed Elbayomi
Mohamed Elbayomi
MWMichael Weyand
Michael Weyand
PPPresheet Pathare
Presheet Pathare
ENEhab Nooh
Ehab Nooh
FHFrank Harig
Frank Harig
Background: The optimal management strategy for acute aortic type A dissection remains controversial. Whether a limited primary (index) repair would increase the need for late aortic reintervention is still an open debate. Methods: A total of 393 consecutive adult patients with acute type A aortic dissection who underwent cardiac surgery were analyzed. Our research hypothesis was whether limited aortic index repair (i.e., isolated aorta ascending replacement without an open distal anastomosis with and without a concomitant aortic valve replacement, including hemiarch replacement procedure) is associated with a higher incidence of late aortic reoperation compared with extended repair (i.e., any other surgical procedure that goes beyond that limited approach). Results: Type of the initial repair had no statically significant relationship with in-hospital mortality with a P-value of 0.12, however in multivariable analysis, cross-clamp time had a statistically significant relation with mortality (P = 0.4). From the patients who survived until discharge (N = 311), 40 patients needed a reoperation on the aorta; the mean interval until reoperation was 4.5 years. The relationship between the type of the initial repair and the need for reoperation didn’t reach a statically significant value (P = 0.9). In-hospitable mortality after the second operation was 10% (N = 4). Conclusion: We reached two conclusions. 1) An extended prophylactic repair in the initial operation of an acute type A aortic dissection might not lead to a lower incidence of reoperations on the aorta and could increase in-hospital mortality by increasing cross-clamp time, and 2) Reoperation on the aorta could be done safely with acceptable mortality outcomes.

6 April 2023 in Journal of Cardiothoracic Surgery
Verified
Journal Article
Open access
PDF file
MEMohamed Elbayomi
Mohamed Elbayomi
MWMichael Weyand
Michael Weyand
ENEhab Nooh
Ehab Nooh
FHFrank Harig
Frank Harig
Dislodgement of a coronary stent-balloon catheter during percutaneous coronary intervention (PCI) is rare but is a life-threatening complication. A 57- year-old male presented with a non-ST elevation myocardial infarction (NSTEMI). Coronary angiography revealed total thrombotic occlusion of the Right coronary artery (RCA). Following the balloon dilatation of the RCA and while trying to retrieve the balloon catheter, the balloon was dislodged from the catheter shaft and entrapped in the coronary vessel. Under cardiopulmonary bypass, with antegrade cardioplegic arrest, the balloon was extracted through a coronary arteriotomy. Right coronary revascularization was done with reversed saphenous vein graft (SVG). Given the variety of equipment that can be retained in the coronary artery and the multitude of mechanisms by which it may be entrapped, there are no straightforward techniques applicable to all situations. Specific guidelines or recommendations on properly managing these potentially life-threatening complications do not exist. However, the most crucial issue in the management of these cases is the hemodynamic status of the patient as well as the coronary flow in the vessel with entrapped device or stent. In our case, the RCA was retrogradely perfused from the left coronary artery, which provided time to transfer the patient to cardiovascular surgical backup.

26 April 2023 in Journal of Artificial Organs
Verified
Journal Article
Open access
PDF file
MEMohamed Elbayomi
Mohamed Elbayomi
RTRene Tandler
Rene Tandler
NENina Ebel
Nina Ebel
DSDirk W. Schubert
Dirk W. Schubert
SWSiegfried Werner
Siegfried Werner
CHChristian Heim
Christian Heim
Patient-tailored silicone plug for HeartMate 3™ left ventricular assist device explantation in two successive males proceeded successfully. Given medical therapeutic advancements, FDA-approved plug systems designed by LVAD manufacturers themselves will be necessary for the near future to provide a safe and simple device explantation alternative that fulfills all regulatory standards.

27 July 2022 in Journal of Cardiac Surgery
Verified
Journal Article
Open access
MEMohamed Elbayomi
Mohamed Elbayomi
MWMichael Weyand
Michael Weyand
CHChristian Heim
Christian Heim
KSKatrin Steger
Katrin Steger
RTRene Tandler
Rene Tandler
The success of the left ventricular assist device (LVAD) as a treatment for terminal left-side heart failure is still restrained by some severe complications associated with mechanical circulatory support. Pump thrombus still affects many patients. It is associated with high morbidity and mortality. The therapeutic options include augmentation of anticoagulation and antiplatelet medication, intravenous or catheter-guided thrombolysis, and pump exchange. Heart transplantation would be a desirable option in this population, but unfortunately, it is only theoretical given the increasing number of LVAD implants and decreasing number of organ donors. A retrograde washout maneuver may be a treatment option in prepump thrombosis in selected patients. Therefore, the decision should be made on an individual basis after balancing the risks and benefits of different treatment approaches. In this context, we report a case of retrograde washout of prepump thrombus in a patient who has been on HeartWare (TM) support for more than 3 years, with a successful bailout strategy.