Publications by authors named "Niket Patel"

Aims: Transcatheter aortic valve implantation (TAVI) is an alternative to surgical aortic valve replacement for patients with aortic valve stenosis. The choice between TAVI, surgery, or a conservative approach should be based upon multiple factors including clinical considerations, technical feasibility, and informed patient preference. In this context, engaging patients in a shared decision-making (SDM) process becomes essential, but this practice is generally underused.

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  • Non-obstructive azoospermia (NOA) is a prevalent and complex issue with varied treatment options and no definitive guidelines, leading to differing management practices internationally.
  • A comprehensive survey with 336 responses from specialists in 49 countries explored current medical and surgical strategies for NOA, analyzing results against existing guidelines and offering expert recommendations.
  • Key findings included diverse approaches to hormonal therapy, significant variation in sperm retrieval success rates, and differing protocols around varicocele repair and follicle-stimulating hormone cutoff levels for sperm retrieval.
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  • * Conducted from July to September 2022, a questionnaire gathered responses from 367 doctors in 49 countries, focusing on how they diagnose NOA through methods like hormone tests and genetic analyses.
  • * The survey identified that while many practices align with guidelines, significant differences in approaches were found, underscoring the need for standardized, evidence-based international guidelines for NOA evaluation.
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  • Cardiac involvement is crucial in systemic amyloidosis outcomes, with this study investigating how myocardial ischaemia affects cellular damage using advanced imaging and tissue analysis.
  • The study involved 93 patients with cardiac amyloidosis and 97 controls, revealing that those with amyloidosis had significantly lower myocardial blood flow during stress tests compared to other groups.
  • Histopathological analysis showed vascular abnormalities and reduced capillary density in cardiac tissue from amyloid patients, highlighting a complex relationship between amyloid infiltration and ischaemia.
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  • Biosimilar drugs expand options in assisted reproductive technology (ART), but more data is needed to compare their effectiveness to originator drugs like Gonal-f.
  • A study analyzed medical records of 364 infertile women treated with Gonal-f or its biosimilars at a clinic in India, focusing on pregnancy and live birth rates as main outcomes.
  • Results indicated that Gonal-f led to significantly higher pregnancy rates (59.2% vs. 39.7%) and live birth rates (43% vs. 17.7%) compared to biosimilars, suggesting it may be the preferable choice in ART.
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Background No data currently exist comparing the contemporary iterations of balloon-expandable (BE) Edwards SAPIEN 3/Ultra and the self-expanding (SE) Medtronic Evolut PRO/R34 valves. The aim of the study was the comparison of these transcatheter heart valves with emphasis on patients with small aortic annulus. Methods and Results In this retrospective registry, periprocedural outcomes and midterm all-cause mortality were analyzed.

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Introduction: Although programmed cell death-1 inhibitors have become the mainstay of treatment for many cancers, their use can at times be accompanied by unusual side effects.

Case Report: We describe herein a 43-year-old patient with Lynch syndrome and colon cancer who developed facial swelling 18 months after starting nivolumab therapy. Our patient also experienced a grade 1 maculopapular rash due to this agent.

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Severe acute respiratory syndrome‑coronavirus‑2 (SARS‑CoV‑2), responsible for COVID-19, is mainly a respiratory illness, but it can affect other organs also such as heart, kidneys, and liver. Myocardial injury from COVID-19 has been reported in hospitalized patients ranging from pericarditis and myocarditis to acute coronary syndrome (ACS). COVID-19 is highly hypercoagulable state and is associated with both central and peripheral thromboembolism.

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Atypical carcinoids are more uncommon than typical carcinoids, and carcinoid syndrome in general is quite rare. Mediastinal atypical carcinoid is a rare neuroendocrine tumor (NET) that spreads aggressively and rapidly. Morphologically, neuroendocrine tumors are classified into typical carcinoid, atypical carcinoid, small cell carcinoma, and large cell neuroendocrine carcinoma, and the latter two are high-grade tumors.

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Objectives: The aim of this study was to compare Doppler flow velocity and thermodilution-derived indexes and to determine the optimal thermodilution-based diagnostic thresholds for coronary flow reserve (CFR).

Background: The majority of clinical data and diagnostic thresholds for flow-based indexes are derived from Doppler measurements, and correspondence with thermodilution-derived indices remain unclear.

Methods: An international multicenter registry was conducted among patients who had coronary flow measurements using both Doppler and thermodilution techniques in the same vessel and during the same procedure.

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Background: Female reproductive tract dysbiosis impacts implantation. However, whether gut dysbiosis influences implantation failure and whether it accompanies reproductive tract dysbiosis remains scantly explored. Herein, we examined the gut-vaginal microbiota axis in infertile women.

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  • Primary Ovarian Insufficiency (POI) and Diminished Ovarian Reserve (DOR) are conditions that cause infertility in women due to insufficient follicular development and ovulation.
  • Egg donation is a common solution, but new reproductive technologies—such as Ovarian Cryopreservation and drug-free autotransplantation—offer alternatives for activating dormant ovarian follicles.
  • A case from India demonstrates successful pregnancy achieved through drug-free activation of follicles followed by autotransplantation in a woman with POI, marking a significant advancement in treatment options.
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Bone marrow-derived cell (BMDC) therapy has numerous applications as potential biological cells for use in regenerative medicine. Here, we present an original case of endometrial atrophy associated with genital tuberculosis in a woman who achieved a live birth with BMDC. This 27-year-old woman came to our center with endometrial atrophy and primary infertility.

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Background: Troponin elevation is common in hospitalized COVID-19 patients, but underlying aetiologies are ill-defined. We used multi-parametric cardiovascular magnetic resonance (CMR) to assess myocardial injury in recovered COVID-19 patients.

Methods And Results: One hundred and forty-eight patients (64 ± 12 years, 70% male) with severe COVID-19 infection [all requiring hospital admission, 48 (32%) requiring ventilatory support] and troponin elevation discharged from six hospitals underwent convalescent CMR (including adenosine stress perfusion if indicated) at median 68 days.

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Aims: Assessment of hyperaemia during adenosine stress cardiovascular magnetic resonance (CMR) remains a clinical challenge with lack of a gold-standard non-invasive clinical marker to confirm hyperaemic response. This study aimed to validate maximum stress myocardial blood flow (SMBF) measured using quantitative perfusion mapping for assessment of hyperaemic response and compare this to current clinical markers of adenosine stress.

Methods And Results: Two hundred and eighteen subjects underwent adenosine stress CMR.

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Objectives: The authors sought to compare the diagnostic accuracy of quantitative perfusion maps to visual assessment (VA) of first-pass perfusion images for the detection of multivessel coronary artery disease (MVCAD).

Background: VA of first-pass stress perfusion cardiac magnetic resonance (CMR) may underestimate ischemia in MVCAD. Pixelwise perfusion mapping allows quantitative measurement of regional myocardial blood flow, which may improve ischemia detection in MVCAD.

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Background: Coronary artery perforation during coronary intervention has high morbidity and mortality. This case describes the collaboration between interventional cardiologists and Interventional radiologists to successfully deploy a peripheral arterial stent graft in a coronary artery that demonstrated persistent extravasation after coronary specific stent graft placement.

Case Presentation: An 84 year old female patient presented with acute coronary syndrome and coronary angiography identified a right coronary artery lesion.

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Objectives: This study sought to assess the performance of cardiovascular magnetic resonance (CMR) myocardial perfusion mapping against invasive coronary physiology reference standards for detecting coronary artery disease (CAD, defined by fractional flow reserve [FFR] ≤0.80), microvascular dysfunction (MVD) (defined by index of microcirculatory resistance [IMR] ≥25) and the ability to differentiate between the two.

Background: Differentiation of epicardial (CAD) and MVD in patients with stable angina remains challenging.

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Surrogacy is an important method of assisted reproductive technology wherein a woman carries pregnancy for another couple. Number of couples around the world require surrogacy services for various reasons. Although this arrangement seems to be beneficial for all parties concerned, there are complex social, ethical, moral, and legal issues associated with it.

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The majority of ovarian cancer patients are diagnosed in late stages of the disease, in which the tumor cells have leaked into the peritoneum and are present as tumorspheres. These tumorspheres are rich in cancer stem-like cells (CSCs), which are resistant to therapy and are a major source of relapse. The purpose of this research was to identify a safe therapeutic approach that could eradicate the peritoneal CSC-rich tumorspheres and inhibit relapse.

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Background & Objectives: Cumulus cell co-culture of embryo had been found to be beneficial for achieving better pregnancy and implantation rate (IR). The present study was aimed to evaluate efficiency of cumulus co-culture technique over simple culture of embryo in terms of pregnancy rate (PR) and IR in patients undergoing treatment for infertility using donor oocytes fertilized by intracytoplasmic sperm injection.

Methods: This was a quasi-experimental study between control and study groups.

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Background: Early risk stratification after primary percutaneous coronary intervention (PPCI) for ST-segment-elevation myocardial infarction is currently challenging. Identification of a low-risk group may improve triage of patients to alternative clinical pathways and support early hospital discharge. Our aim was to assess whether the index of microcirculatory resistance (IMR) at the time of PPCI can identify patients at low risk of early major cardiac complications and to compare its performance against guideline-recommended risk scores.

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Vectors used for stem cell transfection must be non-genotoxic, in addition to possessing high efficiency, because they could potentially transform normal stem cells into cancer-initiating cells. The objective of this research was to bioengineer an efficient vector that can be used for genetic modification of stem cells without any negative somatic or genetic impact. Two types of multifunctional vectors, namely targeted and non-targeted were genetically engineered and purified from E.

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