Left ventricular global longitudinal strain in COVID-19 recovered patients.

OBJECTIVES: Myocardial injury during active coronavirus disease-2019 (COVID-19) infection is well described; however, its persistence during recovery is unclear. We assessed left ventricle (LV) global longitudinal strain (GLS) using speckle tracking echocardiography (STE) in COVID-19 recovered patients and its correlation with various parameters. METHODS: A total of 134 subjects within 30-45 days post recovery from COVID-19 infection and normal LV ejection fraction were enrolled. Routine blood investigations, inflammatory markers (on admission) and comprehensive echocardiography including STE were done for all. RESULTS: Of the 134 subjects, 121 (90.3%) were symptomatic during COVID-19 illness and were categorized as mild: 61 (45.5%), moderate: 50 (37.3%) and severe: 10 (7.5%) COVID-19 illness. Asymptomatic COVID-19 infection was reported in 13 (9.7%) patients. Subclinical LV and right ventricle (RV) dysfunction were seen in 40 (29.9%) and 14 (10.5%) patients, respectively. Impaired LVGLS was reported in 1 (7.7%), 8 (13.1%), 22 (44%) and 9 (90%) subjects with asymptomatic, mild, moderate and severe disease, respectively. LVGLS was significantly lower in patients recovered from severe illness(mild: -21 ± 3.4%; moderate: -18.1 ± 6.9%; severe: -15.5 ± 3.1%; p < 0.0001). Subjects with reduced LVGLS had significantly higher interleukin-6 (p < 0.0001), C-reactive protein (p = 0.001), lactate dehydrogenase (p = 0.009), serum ferritin (p = 0.03), and troponin (p = 0.01) levels during index admission. CONCLUSIONS: Subclinical LV dysfunction was seen in nearly a third of recovered COVID-19 patients while 10.5% had RV dysfunction. Our study suggests a need for closer follow-up among COVID-19 recovered subjects to elucidate long-term cardiovascular outcomes.

Left atrial function by two-dimensional speckle tracking echocardiography in patients with severe rheumatic mitral stenosis and pulmonary hypertension.

We studied left atrial (LA) function in severe rheumatic mitral stenosis (MS) patients using two-dimensional speckle tracking echocardiography (STE). Eighty patients with isolated severe MS in sinus rhythm and 40 controls underwent comprehensive echocardiography including STE derived LA strain [reservoir strain (LASr), conduit strain (LAScd) and contractile strain (LASct)]. The mean MVA was 0.93 ± 0.21 cm2. The mean values of LASr (14.73 ± 8.59%), LAScd (-7.61 ± 4.47%) and LASct (-7.16 ± 5.15%) in patients were significantly lower (p < 0.001) vs. controls 44.11 ± 10.44%, -32.45 ± 7.63%, -11.85 ± 6.77% respectively and showed decreasing trend with increasing MS severity and higher NYHA class. In conclusion, LA dysfunction is prevalent in severe MS irrespective of NYHA functional class.

Sexual Dimorphism of Dexamethasone as a Prophylactic Treatment in Pathologies Associated With Acute Hypobaric Hypoxia Exposure.

Dexamethasone can be taken prophylactically to prevent hypobaric hypoxia-associated disorders of high-altitude. While dexamethasone-mediated protection against high-altitude disorders has been clinically evaluated, detailed sex-based mechanistic insights have not been explored. As part of our India-Leh-Dexamethasone-expedition-2020 (INDEX 2020) programme, we examined the phenotype of control (n = 14) and dexamethasone (n = 13) groups, which were airlifted from Delhi (∼225 m elevation) to Leh, Ladakh (∼3,500 m), India, for 3 days. Dexamethasone 4 mg twice daily significantly attenuated the rise in blood pressure, heart rate, pulmonary pressure, and drop in SaO2 resulting from high-altitude exposure compared to control-treated subjects. Of note, the effect of dexamethasone was substantially greater in women than in men, in whom the drug had relatively little effect. Thus, for the first time, this study shows a sex-biased regulation by dexamethasone of physiologic parameters resulting from the hypoxic environment of high-altitude, which impacts the development of high-altitude pulmonary hypertension and acute mountain sickness. Future studies of cellular contributions toward sex-specific regulation may provide further insights and preventive measures in managing sex-specific, high-altitude-related disorders.

Coherence between Existing System of Defining Urban Poor with Kuppuswamy and Hashim's System; Which is More Relevant?

BACKGROUND: Identification of below poverty line (BPL) households is of paramount importance to provide benefits under poverty alleviation and other programs. OBJECTIVES: (1) To assess households in urban slums in terms of housing, assets, and amenities. (2) To compare three different systems of socioeconomic status (SES) - ration card holders, Modified Kuppuswamy Scale, and Hashim's system. MATERIALS AND METHODS: A cross-sectional, community-based study was conducted in urban slums of field practice area of a medical college, Pune. Considering 35% of urban households in India qualify as poor, sample size of 593 households was calculated. A predesigned, validated, pretested questionnaire was used, covering sociodemographic domains including indicators of three systems. Agreement between these scales was calculated by kappa statistics. RESULTS: Total 639 households were surveyed covering 3078 slum population. Percentage of BPL families according to possession of yellow ration card, Modified Kuppuswamy Scale, and Hashim's system were 35.99%, 48.67%, and 48.51%, respectively. The proportion of agreement between Kuppuswamy scale and ration card was 55.71% and for Hashim system and ration card was 51.79%. CONCLUSIONS: The present study revealed no agreement between these three systems. Hashim system gives more accurate and realistic picture of SES of the urban slums households owing to its holistic approach.

The study of novel inflammatory markers in takayasu arteritis and its correlation with disease activity.

OBJECTIVES: Currently, erythrocyte sedimentation rate (ESR) and highly sensitive serum C-reactive protein (hsCRP) levels are used to monitor disease activity and guide therapy in Takayasu Arteritis (TA). However, non-specificity of these markers suggests the need for novel biomarkers. In this pilot study, we explore the role of novel biomarkers for evaluating disease activity in TA. METHODS: A total of 40 patients with TA were divided into active and stable disease groups. Disease activity was assessed according to the National Institutes of Health criteria proposed by Kerr et al. Routine blood investigations were obtained and serum tumor necrosis factor (TNF)-α, interleukin (IL)-1, IL-6, IL-18, ESR, hsCRP levels and NLR (neutrophil to lymphocyte ratio) were assayed at baseline and after 6 months. RESULTS: Among the 40 patients enrolled, 18 were classified as active while 22 were stable at baseline and with a similar pattern at 6 months. Along with ESR and hsCRP, IL-6 and IL-18 levels were significantly higher in the active disease group than in the stable disease group (p < 0.005). The levels of other novel biomarkers (IL-1, TNF-α) and NLR were not significantly higher in active disease group. CONCLUSION: Serum IL-6 and IL-18 levels correlates well with disease activity in TA which suggests their important role in disease pathogenesis and may be helpful in guiding and monitoring therapy in active TA patients.

Left and right ventricular deformation in patients with severe mitral stenosis and pulmonary hypertension undergoing percutaneous balloon mitral valvuloplasty: A two dimensional speckle-tracking echocardiographic study.

Seventy-five patients with isolated severe MS (mitral valve area: 1.10 ± 0.15 cm2) and pulmonary hypertension underwent regional and global longitudinal strain (GLS) measurements of left (LV) and right ventricle (RV) at baseline and within 48 h after percutaneous balloon mitral valvuloplasty (PBMV). PBMV resulted in significant improvement in LV GLS (-16.35 ± 1.67% vs -19.98 ± 2.17%) and RV GLS (-10.34 ± 2.38% vs -13.83 ± 2.04%), p < 0.001 for both. Absolute increase in strain of basal segments of LV was more compared to mid and apical segments. We also found significant positive correlation between decrease in mean LA pressure (pre PBMV 28.91 ± 4.21 mm Hg vs post PBMV 10.55 ± 3.04 mm Hg, difference of 16.36 mm Hg; p < 0.001) obtained invasively during PBMV for 62 patients with improvement in LV GLS (r = 0.257, p = 0.048), RV GLS (r = 0.267, p = 0.043), and fall in right ventricular systolic pressure (r = 0.308, p = 0.022) that occurred post PBMV. The LV dysfunction is predominantly because of altered hemodynamics due to restricted LV filling with additional contribution from rheumatic involvement of basal LV myocardial segments. The improvement in LV deformation after PBMV is likely due to increase in preload. RV afterload reduction because of LA pressure decrease improved RV deformation.