Rajiv Das

Dr. Rajiv Das


Research Focus & Metrics

Academic Career Length

6Years (2021-Present)

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

Representative Publications

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Verified
Journal Article
Open access
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MOMuntaser Omari
Muntaser Omari
SMSaif Memon
Saif Memon
DSDebbie Stewart
Debbie Stewart
MAMohamed Ali
Mohamed Ali
RERichard Edwards
Richard Edwards
Mohammad AlkhalilMohammad Alkhalil
Mohammad Alkhalil
Background: Left bundle branch block (LBBB) following trans-catheter aortic valve implantation (TAVI) has been excluded from same-day discharge. Early identification of patients with stable LBBB can help facilitate same-day discharge. We aim to assess the role of 6-hour ECG to determine development of LBBB in patients undergoing TAVI. Methods: This is a prospective single-centre study of patients who have LBBB following elective TAVI procedures. All patients underwent ECGs pre-TAVI, as well as immediately, 6 h, and 24 h post-TAVI. Changes in ECG were compared at 6 and 24 h with the one immediately post TAVI. Results: The study included 115 patients with uncomplicated procedures. The mean age was 81 ± 7 years, with 54% male. A self-expanding valve was used in 67% of patients. Following TAVI, prolongations of PR interval and QRS duration were dynamic and reduced at 6 h. The change in PR interval at 6 and 24 h was comparable [−11 (−20 to 3) vs. −2 (−24 to 16) ms, p = 0.18]. Similarly, there was no statistical difference in the change of QRS duration at 6 and 24 h compared to the ECG immediately post-TAVI [−10 (−40 to −2) vs. −7 (−34 to 0) ms, p = 0.055]. Changes in ECG were also comparable in patients undergoing balloon-expandable and self-expanding valves. Conclusions: The current study supports that 6-hour ECG has the potential to reduce the need for prolonged continuous monitoring post-TAVI. ECG at 6 h can help optimise patient flow and facilitate early discharge. Future studies with larger sample sizes are required to confirm our findings.

13 December 2024 in Geriatrics
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Journal Article
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CNCharlotte Nichol
Charlotte Nichol
RDRajiv Das
Rajiv Das
GBGillian Barry
Gillian Barry
MKMichael Kelly
Michael Kelly
IVIoannis Vogiatzis
Ioannis Vogiatzis
Nicola AdamsNicola Adams
Nicola Adams
Introduction: Despite an established evidence-base for cardiac rehabilitation (CR) improving functional outcomes and quality of life and reducing re-hospitalisation, there is limited research on CR for older cardiac patients, who require rehabilitation the most, as they are often very deconditioned due to aortic stenosis (AS). CR uptake in the UK is limited to 52% with national variability of provision and accessibility, and it is a national priority to increase uptake to 85%. Frequently, research has excluded older populations as they are deemed to be too frail or generally not suitable for inclusion. This study aimed to explore factors that can impact the uptake of CR in octogenarians. Methods: Qualitative interviews were carried out with 20 AS patients (12 female, 8 male), from a large NHS Trust in the North East of England. Results: Four main themes were identified in the data: Perceptions and Understanding, Delivery and Accessibility, Perceived Impact of Exercise and Health and Life Changes, and Transportation. Discussion: The findings suggested that the major factors were the understanding of the nature, purpose and relevance of CR to older patients, whether CR was offered, and the role of social support. Barriers and facilitators can impact uptake based on the mode of delivery and the individual circumstances identified. Future research could explore how to develop CR programmes that overcome the barriers identified in the research, such as education, monitoring strategies, use of telehealth, and home-based elements to create an acceptable and accessible programme for octogenarians.

12 October 2021 in European Heart Journal - Case Reports
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Journal Article
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MFMohamed Farag
Mohamed Farag
Mohammad AlkhalilMohammad Alkhalil
Mohammad Alkhalil
RERichard Edwards
Richard Edwards
RDRajiv Das
Rajiv Das
Over the past decade, innovations in percutaneous device technology have reduced the rate of major complications in patients undergoing transcatheter aortic valve implantation (TAVI). Nonetheless, vascular complications remain the Achilles’ heel of TAVI and are associated with a poor outcome. 1

18 August 2026 in Journal of Clinical Medicine
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Journal Article
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HKHilal Khan
Hilal Khan
SDSophia Das
Sophia Das
RDRajiv Das
Rajiv Das
Severe aortic stenosis represents a growing burden of disease globally with a high risk of death if untreated. There are sex differences in the pathophysiological disease process affecting the aortic valve, patients’ clinical presentation, progression of valve disease, ventricular adaptation, timing of symptom onset, delays in diagnosis, and treatment strategies. Female patients are more likely than male patients to have preserved left ventricular function with concentric left ventricular hypertrophy and smaller left ventricular cavity sizes, which consequently produce low stroke volumes and more paradoxical low flow low gradient severe aortic stenosis. These differences can lead to diagnostic uncertainty resulting in delays to treatment and associated morbidity and mortality. The higher mortality rate reported in women in observational cohorts is multifactorial. It is influenced by delayed diagnosis, lower referral rates, older age at intervention and frailty; rather than female sex alone. There exist variations in the treatment and management of aortic stenosis with women being underdiagnosed and conservatively managed compared to men. A better understanding of the differences in pathophysiology, ventricular adaptation and haemodynamic effects between the sexes are key to improving diagnostic accuracy and referral for timely intervention. Women may require a more tailored approach to their lifetime management of aortic stenosis due to their smaller anatomy and greater comorbidity burden at presentation. This narrative review explores the epidemiology, pathophysiology, presentation, diagnosis and management of aortic stenosis in female patients.

6 May 2026 in Medicina
Verified
Journal Article
Open access
PDF file
MAMohamed Ali
Mohamed Ali
MOMuntaser Omari
Muntaser Omari
DSDebbie Stewart
Debbie Stewart
SLSarah Lamb
Sarah Lamb
TCTimothy Robert Graham Cartlidge
Timothy Robert Graham Cartlidge
Mohammad AlkhalilMohammad Alkhalil
Mohammad Alkhalil
Background and Objectives: Recent studies have focused on evaluating the hemodynamic results in patients undergoing transcatheter aortic valve implantation (TAVI) with small aortic annuli. There is limited data on the incidence, clinical characteristics, and mortality of prosthesis–patient mismatch (PPM) in patients undergoing TAVI with large aortic annuli. Materials and Methods: This is a retrospective analysis of consecutive patients with severe aortic stenosis and large annuli who underwent TAVI at a single UK center. PPM was defined according to the Valve Academic Research Consortium (VARC-3) criteria and identified using echocardiography within 4–6 weeks following TAVI. Measurements were analyzed by an experienced operator who was blinded to the type of valve platform and clinical outcomes. Results: A total of 447 patients were screened, of whom 353 patients were included in the analysis. The incidence of any PPM or severe PPM was 38% and 15% of patients, respectively. Patients with severe PPM were younger, had larger body surface area, and were more likely to receive a balloon-expandable valve (BEV). At a mean follow-up of 35 months, mortality was numerically higher in patients with severe PPM (46% vs. 36%, p = 0.20) but this did not reach statistical significance. Similar mortality rates were observed among patients with or without severe PPM in those who received SEV as well as BEV. There was a differential role of body surface area in mortality in patients who developed severe PPM versus non-severe PPM. Conclusions: Severe PPM was evident in patients with large aortic annuli undergoing TAVI, particularly those who received BEV. Nonetheless, severe PPM did not impact mortality rate at three-year follow-up. Longer-term follow-up may be required to assess the impact of severe PPM on mortality.

17 September 2026 in Journal of Clinical Medicine
Verified
Journal Article
Open access
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PTParaskevi Trivilou
Paraskevi Trivilou
OAOmran Amer Omran Abukhalaf
Omran Amer Omran Abukhalaf
MEMOAD EL-HADDAD
MOAD EL-HADDAD
MOMuntaser Omari
Muntaser Omari
DSDebbie Stewart
Debbie Stewart
Mohammad AlkhalilMohammad Alkhalil
Mohammad Alkhalil
Background: Patients undergoing urgent transcatheter aortic valve implantation (TAVI) represent a clinically high-risk population with increased peri-procedural morbidity. Whether an early discharge strategy is feasible and safe remains unclear. We evaluated the feasibility of early discharge in patients undergoing urgent transcatheter aortic valve implantation. Methods: This single-centre observational cohort study included 279 consecutive patients undergoing urgent TAVI (mean age 81 ± 7 years; 155 [56%] male). Patients were stratified according to post-TAVI length of stay into next-day discharge or prolonged hospitalisation (>1 day). Data were prospectively collected and the primary end point was 30-day all-cause mortality. Results: Among 279 urgent TAVI patients, 62 (22%) were discharged the next day and 217 (78%) had prolonged hospitalisation. Baseline clinical and echocardiographic characteristics were similar between the two groups. Among the 279 patients surviving to discharge assessment, 30-day mortality was 0.4%, with no significant difference between the next-day and longer-stay groups. Patients in the short hospital stay group had an 11% complication rate compared to 30% in the long stay one. Unlike stroke or pacemaker implantation, vascular complication was an independent predictor of extended in-hospital length of stay [Beta coefficient 3.41, 95% CI (0.98 to 5.85), p = 0.006]. Conclusions: Next-day discharge appears feasible in carefully selected patients undergoing urgent TAVI and was not associated with excess 30-day mortality in this observational cohort. Prospective multi-centre studies are required to validate these findings and establish standardised discharge criteria.