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Objective: Knowledge regarding the short-term outcomes after same-day discharge (SDD) post primary percutaneous coronary intervention (PCI) is lacking. In this study, we evaluated 1-year major adverse cardiovascular events (MACE) among SDD patients after primary PCI., Design: 1-year follow-up analysis of a subset of patients from an existing prospective cohort study., Setting: Tertiary care cardiac hospital in Karachi, Pakistan., Participants: Consecutive patients, from August 2019 to July 2020, with ST segment elevation myocardial infarction who had undergone primary PCI with SDD (within 24 hours) after the procedure by the treating physician and with at least one successful follow-up up to 1 year., Outcome Measure: Cumulative MACE during follow-up at the intervals of 1 week, 1 month, 6 months and 1 year., Results: 489 patients were included, with a gender distribution of 83.2% (407) male patients and a mean age of 54.58±10.85 years. Overall MACE rate during the mean follow-up duration of 326.98±76.71 days was 10.8% (53), out of which 26.4% (14/53) events occurred within 6 months of discharge and the remaining 73.6% (39/53) occurred between 6 months and 1 year. MACE was significantly higher among patients with a Zwolle Risk Score (ZRS) ≥4 at baseline, with an incidence rate of 21.9% (16/73) vs 8.9% (37/416; p=0.001) in patients with ZRS≤3 (relative risk 2.88 (95% CI 1.5 to 5.5))., Conclusion: A significant burden of short-term MACE was identified among SDD patients after primary PCI; most of these events occurred after 6 months of SDD, mainly among patients with ZRS≥4. A systematic risk assessment based on risk stratification modalities such ZRS could be a viable option for SDD patients with primary PCI., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2023. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)

Background: Aim of this study was to perform quantitative evaluation of high thrombus burden (Grade ≥4) as an independent predictor of slow/no reflow phenomenon during primary percutaneous coronary interventions (PCI) of patients with ST-segment elevation myocardial infarction (STEMI)., Methods: In this analytical cross-sectional study we included consecutive patients who have undergone primary PCI for STEMI at a tertiary care cardiac center of the Pakistan. High thrombus burden was defined as angiographic thrombus grade ≥4. The thrombolysis in myocardial infarction (TIMI) flow rate < III was defined as slow/no reflow phenomenon. Results of multivariate logistic regression analysis for slow/no reflow phenomenon were reported as odds ratio (OR)., Results: This analysis included 747 patients, 78.2% (584) patients were male and mean age was 55.82±11.54 years. High thrombus burden was observed in 68.1% (509) of the patients. Slow/no reflow phenomenon was observed in 33.6% (251) which was more common among patients in high thrombus burden group, 39.7% (202/509) vs. 20.6% (49/238); p<0.001. Adjusted OR of thrombus Grade ≥ 4 was 2.33 [1.6 -3.39]; p<0.001. Other significant variables were female gender (1.51 [1.01 -2.27]; p=0.045), left ventricular end-diastolic pressure (LVEDP) ≥20 mmHg (2.34 [1.69 -3.26]; p<0.001), total lesion length ≥20 cm (1.54 [1.09-2.16]; p=0.014), and neutrophil count ≥8.8 cells/μL (1.72 [1.22 -2.43]; p=0.002)., Conclusions: High thrombus burden (Grade ≥4) is a significant and an independent predictor of the slow/no reflow phenomenon. While predicting slow/no reflow phenomenon, thrombus burden should be given due importance along with other significant factors such as gender, LVEDP, lesion length, and neutrophil counts.

Background: This study was conducted with the aim of providing a quantitative appraisal of clinical outcomes of trans-radial access for primary percutaneous coronary interventions (PCI) in patients with ST-segment evaluation myocardial infarction (STEMI)., Methods: In this study, we compared two propensity-matched cohorts of patients who underwent primary PCI via trans-radial (TRA) and trans-femoral access (TFA) in a 1:1 ratio. The profile of two cohorts was matched for gender, age, and body mass index, diabetes, hypertension, family history, and smoking. The outcomes of primary PCI were compared for the two cohorts which included all-cause in-hospital mortality, heart failure, re-infarction, cardiogenic shock, bleeding, transfusion, cerebrovascular accident, and dialysis., Results: This analysis was performed on a total of 2316 patients with 1158 patients each in the TRA and TFA group. We observed significantly lower rates of mortality, 0.8% (9) vs. 3.5% (41); p < 0.001 and bleeding, 0.5% (6) vs.1.6% (19); p = 0.009 with shorter hospital stay, 1.61 ± 1.39 vs. 1.98 ± 1.5 days, in trans-radial vs. trans-femoral. However, both fluoroscopic time and contrast volume were significantly higher in the TRA as compared to TFA group 15.57 ± 8.16 vs. 12.79 ± 7.82 min; p < 0.001 and 143.22 ± 45.33 vs. 133.78 ± 45.97; p < 0.001 respectively., Conclusions: Compared with TFA access, TRA for primary PCI is safe for patients with STEMI, it was found to be associated with a significant reduction in in-hospital mortality and bleeding complications., Competing Interests: Declaration of Competing Interest All authors have none to declare., (Copyright © 2020 Cardiological Society of India. Published by Elsevier B.V. All rights reserved.)

Rajesh Kumar,1 Mahesh Kumar Batra,1 Sanam Khowaja,1 Ali Ammar,1 Ashok Kumar,1 Jehangir Ali Shah,1 Jawaid Akbar Sial,1 Tahir Saghir,1 Musa Karim2 1Adult Cardiology Department, National Institute of Cardiovascular Diseases (NICVD), Karachi, Pakistan; 2Research Department, National Institute of Cardiovascular Diseases (NICVD), Karachi, PakistanCorrespondence: Rajesh KumarNational Institute of Cardiovascular Diseases (NICVD), Karachi, PakistanEmail rajeshnarsoolal@gmail.comObjective: Promising results of CHA2DS2-VASc score have been reported for the prediction of contrast-induced acute kidney injury (CI-AKI) after percutaneous coronary intervention (PCI). However, data of its predictive strength in the context of primary PCI are not available. Therefore, in this study, we have assessed predictive value of CHA2DS2-VASc score for CI-AKI after primary PCI.Methods: This analytical cross-sectional study was conducted between January 2021 and June 2021 at the National Institute of Cardiovascular Diseases (NICVD), Karachi, Pakistan. Inclusion criteria of the study was consecutive adult patients who had undergone primary PCI. Baseline CHA2DS2-VASc score was calculated, and either a 25% or 0.5 mg/dL increase in post-procedure serum creatinine level as compared to baseline level was categorized as CI-AKI.Results: A total of 691 patients were included, of which 82.1% (567) were male. CI-AKI after primary PCI was observed in 63 (9.1%) patients, out of which 66.7% (42) of patients had CHA2DS2-VASc score of ≥ 2. The area under the curve (AUC) for the score was 0.725 [0.662 to 0.788] with a sensitivity and specificity of 66.7% [63.1% to 70.2%] and 66.7% [53.7% to 78.1%], respectively, at a cut-off value of ≥ 2. In multivariable analysis, left ventricular ejection fraction ≤ 30% and CHA2DS2-VASc ≥ 2 were found to be independent predictors with adjusted odds ratios of 2.19 [1.06– 4.5] and 2.13 [1.13– 4.01], respectively.Conclusion: CHA2DS2-VASc score has a good predictive value for the prediction of CI-AKI after primary PCI. Criteria of CHA2DS2-VASc ≥ 2 can be used for the risk stratification of CI-AKI after primary PCI.Keywords: ST elevation myocardial infarction, STEMI, percutaneous coronary intervention, primary PCI, contrast-induced acute kidney injury, CI-AKI, CHA2DS2-VASc score, contrast-induced nephropathy, CIN