Publications by authors named "Ghanshyam P S Shantha"

Background: Atrial fibrillation (AF) is the most common cardiac arrhythmia associated with high morbidity and mortality. AF treatment is guided by a patient-provider risk-benefit discussion regarding drug versus ablation or combination. Thermal ablation has a high rate of adverse events compared to pulsed field ablation (PFA).

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Background There are limited data on the role of temporary mechanical circulatory support ( MCS ) devices for cardiogenic shock before left ventricular assist device ( LVAD ) surgery. This study sought to evaluate the trends of use and outcomes of MCS in cardiogenic shock before LVAD surgery. Methods and Results This was a retrospective cohort study from 2005 to 2014 using the National Inpatient Sample (20% stratified sample of US hospitals).

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Diabetes mellitus (DM) serves as an important prognostic indicator in patients with cardiac-related illness. Our objective is to compare survival and neurological outcomes among diabetic and non-diabetic patients who were admitted to the hospital after an out-of-hospital cardiac arrest (OHCA). We searched MEDLINE and EMBASE for relevant articles from database inception to July 2018 without any language restriction.

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Postcardiac surgery cardiogenic shock (PCCS) is seen in 2% to 6% of patients who undergo cardiac surgery. There are limited large-scale data on the use of mechanical circulatory support (MCS) in these patients. This study sought to evaluate the in-hospital mortality, trends, and resource utilization for PCCS admissions with and without MCS.

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We compared the risk of radial artery occlusion (RAO) in patients undergoing coronary intervention with introducer sheath (SG) or without introducer sheath (SLG). 1251 consecutive patients, from 2 tertiary care center in Pennsylvania, USA, undergoing percutaneous coronary interventions (PCI) between 2008-2013 formed the study cohort (SLG: 161 patients, SG: 1090 patients). Radial artery patency was assessed using plethysmography.

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Left ventricular assist devices (LVADs) have emerged as an attractive option in patients with advance heart failure. Nationwide readmission database 2013 to 2014 was utilized to identify LVAD recipients using ICD-9 procedure code 37.66.

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Background: Catheter ablation is widely accepted intervention for atrial fibrillation (AF) refractory to antiarrhythmic drugs, but limited data are available regarding contemporary trends in major complications and in-hospital mortality due to the procedure. This study was aimed at exploring the temporal trends of in-hospital mortality, major complications, and impact of hospital volume on frequency of AF ablation-related outcomes.

Methods: The Nationwide Inpatient Sample database was utilized to identify the AF patients treated with catheter ablation.

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Article Synopsis
  • This study investigates the effectiveness of coronary computed tomography angiography (CCTA) in diagnosing significant coronary artery disease (CAD) in patients being considered for aortic valve replacement (AVR), using invasive coronary angiography (ICA) as the benchmark.
  • A review of thirteen studies involving 1498 patients showed a 43% prevalence of significant stenosis, with CCTA demonstrating high sensitivity (95%) and reasonable specificity (79%) in identifying CAD.
  • The findings suggest that CCTA could be a beneficial diagnostic tool before AVR surgeries, but further research is needed to fully understand its role in preoperative planning.
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Female gender was included in stroke prediction algorithms in an attempt to improve anticoagulation rates in women with atrial fibrillation (AF). It is unclear if these efforts reduced stroke burden in women with AF. To bridge this literature gap, using the Nationwide Inpatient Sample, we assessed gender differences in the trends of hospitalizations for stroke among patients with AF in the United States in 2005 to 2014.

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Background: We assessed the predictive accuracy of an empirically-derived score (weight loss, insulin resistance, and glycemic control: "WIG") to predict patients who will be successful in reducing diabetes mellitus (DM) medication use with weight loss.

Methods: Case records of 121 overweight and obese patients with DM at two outpatient weight management centers were analyzed.

Results: Mean period of follow-up was 12.

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Background: The Trial of Routine Aspiration Thrombectomy with PCI versus PCI alone in patients with STEMI (TOTAL trial) refuted the salutary effect of routine aspiration thrombectomy (AT) in PPCI for patients with ST-elevation myocardial infarction (STEMI).

Objectives: We performed an updated meta-analysis to assess clinical outcomes with AT prior to PPCI compared with conventional PPCI alone including the additional trial data.

Methods And Results: Clinical trials (n = 20) that randomized patients (n = 21,281) with STEMI between Routine AT (n = 10,619) and PPCI (n = 10,662) were pooled.

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Article Synopsis
  • Women with ST-segment elevation myocardial infarction (STEMI) experience higher mortality rates than men, despite improvements in treatment over the past 20 years.
  • The study performed a meta-analysis of 35 observational studies to investigate sex differences in mortality among patients treated with primary percutaneous coronary intervention (PPCI).
  • Results showed that women had a significantly higher risk of both in-hospital and 1-year mortality compared to men, although this association was less pronounced when adjusting for other factors.
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Data comparing the effect of renal denervation (RD) with those of maximal medical therapy (MMT) have shown conflicting results. Also, effect of RD on pulse pressure (PP) has not been evaluated. The aim of this meta-analysis was to compare the effect of RD with that of MMT on blood pressure (BP) and PP at 6-month follow-up in patients with resistant hypertension.

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Article Synopsis
  • - The study evaluated the prevalence of blindness and visual impairment (VI) in three tribal areas of Andhra Pradesh, India, utilizing a two-stage sampling survey to gather data and compare it with other low- and middle-income countries.
  • - Among the 7281 participants, the rates of VI, severe visual impairment (SVI), and blindness were found to be 16.9%, 2.9%, and 2.3%, respectively, with refractive errors primarily causing VI and cataracts being the leading cause of SVI and blindness.
  • - The research revealed that a significant portion (88.5%) of blindness and SVI causes were avoidable, highlighting the need for improved eye care services in these underserved tribal
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Purpose: Recent evidence associates sympathetic tone with severity of obstructive sleep apnea (OSA). Renal sympathetic denervation (RDN), by decreasing sympathetic tone, has the potential to decrease OSA severity. Small observational studies that assessed this hypothesis lacked precision.

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Hypercalcemia in sarcoidosis is due to three mechanistic reasons: (1) systemic conversion of 25-hydroxyvitamin D to 1,25-dihydroxyvitamin D by the enzyme 1-α hydroxylase produced by activated monocyte/macrophage system, (2) production of parathormone-related peptide (PTHrP) by the sarcoid granuloma, (3) tissue-level conversion of 25-hydroxyvitamin D to 1,25-dihydroxyvitamin D by 1-αhydroxylase produced by local monocyte/macrophage system in the sarcoid granuloma. We report two cases of one proposed mechanism of hypercalcaemia in sarcoidosis (mechanism 3). Both individuals presented with sarcoidosis and 25-hydroxyvitamin D deficiency and developed symptomatic hypercalcaemia with vitamin D replacement.

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Background: Though it is well known that weight loss tends to decrease blood pressure, the quantitative association between the magnitude of weight loss and the effect on the need for antihypertensive medications is not well studied. We analyzed this association among overweight and obese attendees at two outpatient weight management centers.

Methods: Case records of patients with a body mass index >25 at baseline were analyzed.

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Objectives: Cardiovascular risk factors such as aging, smoking, and insulin resistance may lead to atherosclerosis through various mechanisms of which their association with mitochondrial dysfunction may be one of them. In order to examine this hypothesis, we assessed the association between elevated blood lactate, a marker of mitochondrial dysfunction, and carotid atherosclerosis.

Methods: From a total of 2066 participants from the Atherosclerosis Risk In Communities Carotid MRI study, 1496 were included for this analysis.

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Background: Oxidative capacity is decreased in type 2 diabetes. Whether decreased oxidative capacity is a cause or consequence of diabetes is unknown. Our purpose is to evaluate whether lactate, a marker of oxidative capacity, is associated with incident diabetes.

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Article Synopsis
  • The study aimed to evaluate visual outcomes and identify risk factors for poor results following cataract surgery in three Integrated Tribal Development Agency areas in Andhra Pradesh, India.
  • A cross-sectional analysis was conducted on 7281 participants aged 50 and older, with a particular focus on 1124 subjects who had undergone cataract surgery; results showed that a significant percentage had poor visual acuity post-surgery, especially among older individuals and the illiterate.
  • The findings indicate that while cataract surgery outcomes are improving, addressing factors such as age, literacy, and access to free surgery is essential for enhancing post-operative results.
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Purpose: The purpose of this study is to assess the relationship between magnitude of weight loss and improvement in percentage A1C (A1C%) among overweight and obese patients with type 2 diabetes mellitus (DM) undergoing weight reduction.

Methods: Case records of patients enrolled in 2 university-based weight management programs were reviewed. Patients were sampled if they had a diagnosis of DM and had at least 1 documented A1C% reduction from their baseline value.

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Refugee camps are prone for easy spread of infections of various kinds and tuberculosis (TB) is no exception. Refugees with renal failure are often a vulnerable group because they are immunocompromised due to reasons such as poor nutrition, overcrowding and immune suppression due to renal failure. Latent pulmonary TB is a particular problem in this patient population as it is not easily diagnosed and has immense potential for spread.

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BACKGROUND/AIM: Subclinical hypothyroidism (SCH) and end-stage renal disease (ESRD) are independent risk factors for cardiovascular mortality. We aimed to study the prevalence of SCH in ESRD patients and assessed its associated risk factors. METHODS: This cross-sectional study was conducted at 2 tertiary-care centers in Chennai, India, over a 3-year period.

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