Extracorporeal membrane oxygenation for postcardiotomy cardiogenic shock after valve replacement.

BACKGROUND: Limited data evaluated the outcomes of extracorporeal membrane oxygenation (ECMO) in patients with prosthetic valves. This study aimed to compare the outcomes of ECMO support for postcardiotomy cardiogenic shock in patients with mechanical versus bioprosthetic valves. METHODS: This retrospective study included patients with ECMO support for postcardiotomy cardiogenic shock after valve replacement. Patients were grouped into bioprosthetic (n = 49) and mechanical valve (n = 22) groups. RESULTS: There were no differences in ECMO duration, inotropic support, intra-aortic balloon pump (IABP), stroke, duration of ICU, and hospital stay between groups. Postoperative thrombosis occurred in 2 patients with bioprosthetic valves (5.41%) and 2 with mechanical valves (14.29%), p = .30. All patients with thrombosis had central ECMO cannulation, concomitant IABP, and inotropic support during ECMO. All thrombi were related to the mitral valve. Three patients with thrombi had hospital mortality.Survival at 6, 12, and 36 months for bioprosthetic valve patients was 30.88%, 28.55%, and 25.34% and for mechanical valves was 36.36% for all time intervals (Log-rank p = .93). One patient had bioprosthetic aortic valve endocarditis after 1 year. Three patients with bioprosthetic valves had structural valve degeneration after 1, 2, and 5 years. CONCLUSIONS: Outcomes of ECMO in patients with prosthetic valves are comparable between bioprosthetic and mechanical valves. Thrombosis might occur in both valve types and was associated with high mortality. ECMO could affect the long-term durability of the bioprosthetic valves.

Postcardiotomy extracorporeal membrane oxygenation in patients with congenital heart disease; the effect of place of initiation.

BACKGROUND: Postcardiotomy extracorporeal membrane oxygenation (ECMO) in pediatric patients can be affected by the place of initiation, either in the operating room (OR) or the pediatric cardiac intensive care unit (PCICU). This study aimed to characterize and compare patients who had postcardiotomy ECMO initiation in the OR or PCICU and evaluate risk factors for hospital mortality. METHODS: This retrospective study included 103 patients who required postcardiotomy ECMO support after the repair of congenital cardiac lesions from 2010 to 2022. Patients were grouped according to the place of ECMO insertion into two groups. Group 1 (n = 69) had ECMO insertion in the OR, and Group 2 (n = 34) had ECMO insertion in the PCICU. RESULTS: Cardiac arrest occurred significantly more often in patients with ECMO insertion in the PCICU (21 (61.76%) vs. 13 (18.84%); p < 0.001). Pre-ECMO lactate levels, pH, VIS, base deficit, and PaO2 did not differ between the groups. Re-exploration for bleeding was significantly higher in Group 1 (32 (46.38%) vs. 8 (23.53%); p = 0.03). Cannula repositioning (4 (11.76%) v. 2 (2.90%); p = 0.09) and mechanical ventilation time were nonsignificantly higher in Group 2 (19.5 (10-31) vs. 11 (5-25) days; p = 0.07). No difference in mortality was found between groups (42 (60.87%) vs. 23 (67.65%), p = 0.50). By multivariable analysis, elevated lactate on ECMO and low pH before ECMO were associated with mortality. CONCLUSIONS: ECMO insertion in the OR has a comparable mortality rate to PCICU insertion. Pre-ECMO low pH and high lactate during ECMO could predict mortality.

Venoarterial extracorporeal membrane oxygenation for postcardiotomy cardiogenic shock: The impact of cannulation strategy on survival.

BACKGROUND: The optimal venoarterial extracorporeal membrane oxygenation (VA ECMO) cannulation strategy in patients with postcardiotomy cardiogenic shock is still debatable. Studies evaluating the effect of cannulation strategy on long-term survival are scarce. OBJECTIVES: We investigated the impact of central versus peripheral cannulation strategy for ECMO insertion on hospital outcomes and survival in postcardiotomy cardiogenic shock patients. METHODS: This retrospective study involved 101 patients who had either central or peripheral ECMO due to postcardiotomy shock between June 2009 and December 2020. Study endpoints were limb ischemia, bleeding, blood transfusion, wound infection, and overall survival. RESULTS: Eighty-four patients received central (c) ECMO, and 17 patients had peripheral (p) ECMO. In the group of pECMO, limb ischemia was significantly higher (5 [29.41%] vs 6 [7.14%]; p = .01). Other endpoints were similar in both groups. Thirty-day mortality was nonsignificantly different between both cohorts (cECMO 34 [41.67%] vs pECMO 10 [58.82%]; p = .29). However, overall survival was better with cECMO (Log-rank p = .02). Patients' age [HR: 1.04 (95% CI: 1.02-1.06); p = .001], pECMO [HR: 1.98 (95% CI: 1.11-3.55), p = .002] and presence of infective endocarditis [HR: 3.54 (95% CI: 1.52-8.24), p = .03] were significant predictors of overall mortality. CONCLUSIONS: Peripheral ECMO was associated with an increased risk of limb ischemia; however, bleeding, blood transfusion, infection, and 30-day mortality were comparable to central ECMO. Central cannulation was associated with a better 1-year survival rate. Therefore, central cannulation might be the preferred strategy for patients with postcardiotomy cardiogenic shock.

Hyperlactatemia and poor outcome After postcardiotomy veno-arterial extracorporeal membrane oxygenation: An individual patient data meta-Analysis.

INTRODUCTION: Postcardiotomy veno-arterial extracorporeal membrane oxygenation (V-A-ECMO) is associated with significant mortality. Identification of patients at very high risk for death is elusive and the decision to initiate V-A-ECMO is based on clinical judgment. The prognostic impact of pre-V-A-ECMO arterial lactate level in these critically ill patients has been herein evaluated. METHODS: A systematic review was conducted to identify studies on postcardiotomy VA-ECMO for the present individual patient data meta-analysis. RESULTS: Overall, 1269 patients selected from 10 studies were included in this analysis. Arterial lactate level at V-A-ECMO initiation was increased in patients who died during the index hospitalization compared to those who survived (9.3 vs 6.6 mmol/L, p < 0.0001). Accordingly, in hospital mortality increased along quintiles of pre-V-A-ECMO arterial lactate level (quintiles: 1, 54.9%; 2, 54.9%; 3, 67.3%; 4, 74.2%; 5, 82.2%, p < 0.0001). The best cut-off for arterial lactate was 6.8 mmol/L (in-hospital mortality, 76.7% vs. 55.7%, p < 0.0001). Multivariable multilevel mixed-effect logistic regression model including arterial lactate level significantly increased the area under the receiver operating characteristics curve (0.731, 95% CI 0.702-0.760 vs 0.679, 95% CI 0.648-0.711, DeLong test p < 0.0001). Classification and regression tree analysis showed the in-hospital mortality was 85.2% in patients aged more than 70 years with pre-V-A-ECMO arterial lactate level ≥6.8 mmol/L. CONCLUSIONS: Among patients requiring postcardiotomy V-A-ECMO, hyperlactatemia was associated with a marked increase of in-hospital mortality. Arterial lactate may be useful in guiding the decision-making process and the timing of initiation of postcardiotomy V-A-ECMO.

Residual versus recurrent mitral regurgitation after transcatheter mitral valve edge-to-edge repair.

BACKGROUND: The number of MtraClip procedures is increasing, and consequently, the number of patients with residual or recurrent mitral regurgitation (MR). We aimed to characterize patients who had residual versus recurrent MR after MitraClip and report the outcomes of different treatment strategies. METHODS: From 2012 to 2020, 167 patients had MitraClip. Out of them, 16 patients (9.5%) had residual mitral regurgitation (MR), and 27 patients (16.2%) had recurrent MR. RESULTS: The median age in patients with residual MR was 67.5 (59-73) years versus 69 (61-78) years in patients with recurrent MR (p = .87). The etiology of mitral valve disease was functional in 13 patients (81.3%) and 22 patients (84.6%) in residual versus recurrent MR patients (p > .99). Cardiac resynchronization therapy-defibrillator implantation was higher in patients with residual MR (p = .02). Survival was 93.7% at 1 year, 76.4% at 3 years versus 92.5% at 1 year, and 84.5% at 3 years in residual versus recurrent MR (p = .69). Two patients in the residual MR group had re-clip, and three had surgery, and in the recurrent MR group, one patient had re-clip, and two patients had surgery (p = .23). Patients who had re-clip were older (p = .09). Surgery was associated with 100% survival at 5 years, 63% after medical therapy and the worst survival was reported in re-clip patients (p = .007). CONCLUSION: The outcomes of patients with residual versus recurrent mitral regurgitation after MitraClip were comparable. Survival could be improved with surgery compared with medical therapy and re-clip.

Reinterventions after transcatheter edge to edge mitral valve repair: Is early clipping warranted?

BACKGROUND: Reintervention after transcatheter edge to edge repair using MitraClip is still challenging. We aimed to report our experience in reinterventions after MitraClip procedures and describe the outcomes. METHODS: From 2012 to 2020, 167 patients had a transcatheter edge to edge repair; 10 of them needed reinterventions. At the time of the first MitraClip, the median EuroSCORE was 4.29 (2.62-7.52), and the ejection fraction was 30 (20-40)%. RESULTS: Emergency mitral valve replacement (MVR) was performed in two patients, elective MVR in three, cardiac transplantation in two, and repeat clipping in threepatients. The median time from MitraClip to the reintervention was 4.5 (2-13) months. One patient required extracorporeal membrane oxygenation support after elective MVR. Repeat clipping failed to control mitral regurgitation grade in all patients. Clip detachment was reported in five patients (50%). The median follow-up after the reintervention was 19.5 (9-75) months, and mortality occurred in two patients who had repeat clipping (20%). CONCLUSIONS: MVR after MitraClip is feasible with low morbidity and mortality. Repeat mitral valve clipping had a high failure rate. Mitral repair was not feasible in all patients in our series, and the use of MitraClip to delay surgical interventions may not be feasible if mitral repair is an option.

Scores predicting atrial fibrillation after mitral valve surgery: Do we need a more specific score?

Background: Atrial fibrillation after cardiac surgery (POAF) is associated with increased morbidity and mortality. Several scores were used to predict POAF, with variable results. Thus, this study assessed the performance of several scoring systems to predict POAF after mitral valve surgery. Additionally, we identified the risk factors for POAF in those patients. Methods: This retrospective cohort included 1381 recruited from 2009 to 2021. The patients underwent mitral valve surgery, and POAF occurred in 233 (16.87%) patients. The performance of CHADS2, CHA2DS2-VASc, POAF, EuroSCORE II, and HATCH scores was evaluated. Results: The median age was higher in patients who developed POAF (60 vs. 54 years; p < .001). CHA2-DS2-VASc, POAF, EuroSCORE II, and HATCH scores significantly predicted POAF, with areas under the curve of the receiver operator curve (AUCROC) of 0.56, 0.61, 0.58, and 0.54, respectively. We identified age > 58 years, body mass index > 28 kg/m2, creatinine clearance < 90 mL/min, reoperative surgery, and preoperative inotropic and intra-aortic balloon pump use as predictors of POAF. We constructed a score from these variables (PSCC-AF). A score > 2 significantly predicted POAF (p < .001). The AUCROC of this score was 0.67, which was significantly higher than the AUCROC of the POAF score (p = .009). Conclusion: POAF after mitral valve surgery can be predicted based on preoperative patient characteristics. The new PSCC-AF score significantly predicted POAF after mitral valve surgery and can serve as a bedside diagnostic tool for POAF risk screening. Further studies are needed to validate the PSCC-AF-mitral score externally.

Age-Specific Outcomes of Bioprosthetic vs. Mechanical Aortic Valve Replacement: Balancing Reoperation Risk with Anticoagulation Burden.

BACKGROUND: The choice of prosthesis for aortic valve replacement (AVR) remains challenging. The risk of anticoagulation complications vs. the risk of aortic valve reintervention should be weighed. This study compared the outcomes of bioprosthetic vs. mechanical AVR in patients older and younger than 50. METHODS: This retrospective study was conducted from 2009 to 2019 and involved 292 adult patients who underwent isolated AVR. The patients were divided according to their age (above 50 years or 50 years and younger) and the type of valves used in each age group. The outcomes of bioprosthetic valves (Groups 1a (>50 years) and 1b (≤50 years)) were compared with those of mechanical valves (Groups 2a (>50 years) and 2b (≤50 years)) in each age group. RESULTS: The groups had nearly equal rates of preexisting comorbidities except for Group 1b, in which the rate of hypertension was greater (32.6% vs. 14.7%; p = 0.025). This group also had higher rates of old stroke (8.7% vs. 0%, p = 0.011) and higher creatinine clearance (127.62 (108.82-150.23) vs. 110.02 (84.87-144.49) mL/min; p = 0.026) than Group 1b. Patients in Group 1a were significantly older than Group 2a (64 (58-71) vs. 58 (54-67) years; p = 0.002). There was no significant difference in the NYHA class between the groups. The preoperative ejection fraction and other echocardiographic parameters did not differ significantly between the groups. Re-exploration for bleeding was more common in patients older than 50 years who underwent mechanical valve replacement (p = 0.021). There was no difference in other postoperative complications between the groups. The groups had no differences in survival, stroke, or bleeding rates. Aortic valve reintervention was significantly greater in patients ≤ 50 years old with bioprosthetic valves. There were no differences between groups in the changes in left ventricular mass, ejection fraction, or peak aortic valve pressure during the 5-year follow-up. CONCLUSIONS: The outcomes of mechanical and bioprosthetic valve replacement were comparable in patients older than 50 years. Using bioprosthetic valves in patients younger than 50 years was associated with a greater rate of valve reintervention, with no beneficial effect on the risk of bleeding or stroke.

Inter-institutional analysis of the outcome after postcardiotomy veno-arterial extracorporeal membrane oxygenation.

INTRODUCTION: Patients requiring postcardiotomy veno-arterial extracorporeal membrane oxygenation (V-A-ECMO) have a high risk of early mortality. In this analysis, we evaluated whether any interinstitutional difference exists in the results of postcardiotomy V-A-ECMO. METHODS: Studies on postcardiotomy V-A-ECMO were identified through a systematic review for individual patient data (IPD) meta-analysis. Analysis of interinstitutional results was performed using direct standardization, estimation of observed/expected in-hospital mortality ratio and propensity score matching. RESULTS: Systematic review of the literature yielded 31 studies. Data from 10 studies on 1269 patients treated at 25 hospitals were available for the present analysis. In-hospital mortality was 66.7%. The relative risk of in-hospital mortality was significantly higher in six hospitals. Observed versus expected in-hospital mortality ratio showed that four hospitals were outliers with significantly increased mortality rates, and one hospital had significantly lower in-hospital mortality rate. Participating hospitals were classified as underperforming and overperforming hospitals if their observed/expected in-hospital mortality was higher or lower than 1.0, respectively. Among 395 propensity score matched pairs, the overperforming hospitals had significantly lower in-hospital mortality (60.3% vs 71.4%, p = 0.001) than underperforming hospitals. Low annual volume of postcardiotomy V-A-ECMO tended to be predictive of poor outcome only when adjusted for patients' risk profile. CONCLUSIONS: In-hospital mortality after postcardiotomy V-A-ECMO differed significantly between participating hospitals. These findings suggest that in many centers there is room for improvement of the results of postcardiotomy V-A-ECMO.

Efficacy of ascorbic acid, N-acetylcysteine, or combination of both on top of saline hydration versus saline hydration alone on prevention of contrast-Induced nephropathy: a prospective randomized study.

BACKGROUND: Antioxidant drugs such as N-acetylcysteine (NAC) and ascorbic acid have been evaluated in interventional studies to prevent contrast-induced nephropathy (CIN), however, there are limited data on comparing either or both, with background of standard intravenous saline hydration versus the standard intravenous saline hydration alone in preventing CIN. METHODS: We conducted a single-center randomized trial among patients undergoing coronary angiography or percutaneous coronary intervention who had serum creatinine ≥ 1.3 mg/dL or were on diabetes mellitus medication. Eligible patients were randomly assigned to one of the following 4 groups: (1) NAC, (2) ascorbic acid, (3) combination of both drugs, and (4) control group. Additionally, all the groups received the standard intravenous saline hydration. Creatinine was measured 4-5 days after procedure. RESULTS: A total of 243 patients were randomized; 62 to NAC, 57 to ascorbic acid, 58 to both drugs, and 66 to placebo. The development of 0.5 mg/dL absolute increase of serum creatinine, 25% relative decrease of creatinine clearance, or either (CIN) were measured in the ascorbic acid group (3.6% for all), NAC group (6.8%, 3.4%, 8.5%, respectively), combined group (5.5%, 5.5%, 9.1%, respectively), and control group (6.2%, 6.2%, 7.7%, respectively). None of these differences were significant (P = 0.896 for serum creatinine, P = 0.863 for creatinine clearance, and P = 0.684 for CIN). CONCLUSIONS: In a cohort of patients at risk of developing CIN, we could not detect any significant benefit of the use of ascorbic acid, NAC, or a combination of both drugs over the standard hydration regimen in preventing CIN.

Long-Term Effects of Postoperative Atrial Fibrillation following Mitral Valve Surgery.

BACKGROUND: New-onset postoperative atrial fibrillation (PoAF) is one of the most frequent yet serious complications following cardiac surgery. Long-term consequences have not been thoroughly investigated, and studies have included different cardiac operations. The objectives were to report the incidence and short- and long-term outcomes in patients with PoAF after mitral valve surgery. METHODS: This is a retrospective cohort study of 1401 patients who underwent mitral valve surgery from 2009 to 2020. Patients were grouped according to the occurrence of PoAF (n = 236) and the nonoccurrence of PoAF (n = 1165). Long-term outcomes included mortality, heart failure rehospitalization, stroke, and mitral valve reinterventions. RESULTS: The overall incidence of PoAF was 16.8%. PoAF was associated with higher rates of operative mortality (8.9% vs. 3.3%, p < 0.001), stroke (6.9% vs. 1.5%, p < 0.001), and dialysis (13.6% vs. 3.5%, p < 0.001). ICU and hospital stays were significantly longer in patients with PoAF (p < 0.001 for both). PoAF was significantly associated with an increased risk of mortality [HR: 1.613 (95% CI: 1.048-2.483); p = 0.03], heart failure rehospitalization [HR: 2.156 (95% CI: 1.276-3.642); p = 0.004], and stroke [HR: 2.722 (95% CI: 1.321-5.607); p = 0.007]. However, PoAF was not associated with increased mitral valve reinterventions [HR: 0.938 (95% CI: 0.422-2.087); p = 0.875]. CONCLUSIONS: Atrial fibrillation after mitral valve surgery is a common complication, with an increased risk of operative mortality. PoAF was associated with lower long-term survival, increased heart failure rehospitalization, and stroke risk. Future studies are needed to evaluate strategies that can be implemented to improve the outcomes of these patients.

HAS-BLED Score for Prediction of Bleeding and Mortality After Transcatheter Aortic Valve Replacement.

INTRODUCTION: Bleeding after transcatheter aortic valve replacement (TAVR) is associated with increased mortality. The predictive value of the HAS-BLED score in TAVR patients is still to be evaluated. We assessed the value of the HAS-BLED score to predict in-hospital bleeding and mortality after TAVR and the impact of diferent renal impairment definitions on the predictive value of the score system. METHODS: We retrospectively included 574 patients who underwent TAVR at a single center. Study outcomes were 30-day mortality and the composite endpoint of major and life-threatening bleeding as defined by The Valve Academic Research Consortium-2. The predictive value of the HAS-BLED score was calculated and compared to a modified model. The performance of the score was compared using two definitions of renal impairment. Model discrimination was tested using C-statistic and the Net Reclassification Index. RESULTS: Bleeding occurred in 78 patients (13.59%). HAS-BLED category 3 was a significant predictor of bleeding (OR: 1.99 ]1.18- 3.37], C-index: 0.56, P=0.01). C-index increased to 0.64 after adding body surface area and extracardiac arteriopathy to the model. The Net Reclassification Index showed an increase in the predic tive value of the model by 11.4% (P=0.002). The C-index increased to 0.61 using renal impairment definition based on creatinine clearance. Operative mortality was significantly associated with the HAS-BLED score (OR: 7.54 [95% CI: 2.73- 20.82], C-index: 0.73, P<0.001). CONCLUSION: The HAS-BLED score could be a good predictor of in-hospital mortality after TAVR. Its predictive value for bleeding was poor but improved by adding procedure-specific factors and using creatinine clearance to define renal impairment.

Management of Tricuspid Valve Regurgitation During Surgical Ventricular Restoration for Ischemic Cardiomyopathy.

INTRODUCTION: We studied the effect of tricuspid valve (TV) surgery combined with surgical ventricular restoration (SVR) on operative outcomes, rehospitalization, recurrent tricuspid regurgitation, and survival of patients with ischemic cardiomyopathy. Additionally, surgery was compared to conservative management in patients with mild or moderate tricuspid regurgitation. To the best of our knowledge, the advantage of combining TV surgery with SVR in patients with ischemic cardiomyopathy had not been investigated before. METHODS: This retrospective cohort study included 137 SVR patients who were recruited from 2009 to 2020. Patients were divided into two groups - those with no concomitant TV surgery (n=74) and those with concomitant TV repair or replacement (n=63). RESULTS: Extracorporeal membrane oxygenation use was higher in SVR patients without TV surgery (P=0.015). Re-exploration and blood transfusion were significantly higher in those with TV surgery (P=0.048 and P=0.037, respectively). Hospital mortality occurred in eight (10.81%) patients with no TV surgery vs. five (7.94%) in the TV surgery group (P=0.771). Neither rehospitalization (log-rank P=0.749) nor survival (log-rank P=0.515) differed in patients with mild and moderate tricuspid regurgitation in both groups. Freedom from recurrent tricuspid regurgitation was non-significantly higher in mild and moderate tricuspid regurgitation patients with no TV surgery (P=0.059). Conservative management predicted the recurrence of tricuspid regurgitation. CONCLUSION: TV surgery concomitant with SVR could reduce the recurrence of tricuspid regurgitation; however, its effect on the clinical outcomes of rehospitalization and survival was not evident. The same effects were observed in patients with mild and moderate tricuspid regurgitation.

Comparison of Outcomes After Transcatheter Versus Surgical Repeat Mitral Valve Replacement.

INTRODUCTION: Repeat transcatheter mitral valve replacement (rTMVR) has emerged as a new option for the management of high-risk patients unsuitable for repeat surgical mitral valve replacement (rSMVR). The aim of this study was to compare hospital outcomes, survival, and reoperations after rTMVR versus surgical mitral valve replacement. METHODS: We compared patients who underwent rTMVR (n=22) from 2017 to 2019 (Group 1) to patients who underwent rSMVR (n=98) with or without tricuspid valve surgery from 2009 to 2019 (Group 2). We excluded patients who underwent a concomitant transcatheter aortic valve replacement or other concomitant surgery. RESULTS: Patients in Group 1 were significantly older (72.5 [67-78] vs. 57 [52-64] years, P<0.001). There was no diference in EuroSCORE II between groups (6.56 [5.47-8.04] vs. 6.74 [4.28-11.84], P=0.86). Implanted valve size was 26 (26-29) mm in Group 1 and 25 (25-27) mm in Group 2 (P=0.106). There was no diference in operative mortality between groups (P=0.46). However, intensive care unit (ICU) and hospital stays were shorter in Group 1 (P=0.03 and <0.001, respectively). NYHA class improved significantly in both groups at one year (P<0.001 for both groups). There was no group effect on survival (P=0.84) or cardiac readmission (P=0.26). However, reoperations were more frequent in Group 1 (P=0.01). CONCLUSION: Transcatheter mitral valve-in-valve could shorten ICU and hospital stay compared to rSMVR with a comparable mortality rate. rTMVR is a safe procedure; however, it has a higher risk of reoperation. rTMVR can be an option in selected high-risk patients.

Five-year outcomes of tricuspid valve repair versus replacement; a propensity score-matched analysis.

BACKGROUND: Tricuspid valve repair (TVr) is the recommended approach for managing tricuspid regurgitation; however, there is a concern about the long-term durability of the repair. Therefore, this study aimed to compare the long-term outcomes of TVr versus tricuspid valve replacement (TVR) in a matched cohort of patients. METHODS: This study included 1161 patients who underwent tricuspid valve (TV) surgery from 2009 to 2020. Patients were grouped according to the procedure into two groups: patients who underwent TVr (n = 1020) and patients who underwent TVR (n = 159). The propensity score identified 135 matched pairs. RESULTS: Renal replacement therapy and bleeding were significantly higher in the TVR group compared to the TVr group both before and after matching. Thirty-day mortality occurred in 38 (3.79%) patients in TVr group versus 3 (1.89%) in the TVR group (P ≤ 0.001) but was not significant after matching. After matching, TV reintervention (hazard ratio (HR): 21.44 (95% CI: 2.17-211.95); P = 0.009) and heart failure rehospitalization (HR: 1.89 (95% CI: 1.13-3.16); P = 0.015) were significantly higher in the TVR group. There was no difference in mortality in the matched cohort (HR: 1.63 (95% CI: 0.72-3.70); P = 0.25). CONCLUSIONS: TVr was associated with lower renal impairment, reintervention, and heart failure rehospitalization than replacement. TVr remains the preferred approach whenever feasible.

Better Survival in Morbidly Obese Patients with Atrial Fibrillation Treated with Non-vitamin K-dependent Oral Anticoagulants.

Background: The efficacy and safety of non-vitamin K-dependent anticoagulants (NOAC) are not well investigated in the obese population, and fixed dosing could lead to under-anticoagulation. Our objective was to evaluate the effect of obesity on anticoagulation outcomes and survival in non-valvular atrial fibrillation (AF) patients. Methods: We enrolled 755 patients who required anticoagulation for AF from 2015 to 2016. We grouped the patients into four groups. Group 1 (n = 297) included patients with BMI< 40 kg/m2 treated with NOACs, Group 2 (n = 358) included patients on warfarin with BMI< 40 kg/m2, Group 3 (n = 57) had patients on NOACs with BMI≥ 40 kg/m2 and Group 4 (n = 43) included patients on warfarin and BMI≥ 40 kg/m2. Study outcomes were the composite endpoint of stroke, bleeding, and survival. Results: Competing risk regression showed that stroke and bleeding were not affected by obesity or treatment (SHR: 1.09 (95% CI: 0.79-1.51); P = 0.62). Older age was the predictor of stroke/bleeding (HR:1.03 (95% CI:1.01-1.06); P = 0.02). Predictors of mortality were heart failure (HR:2.23 (95% CI:1.25-3.97); P = 0.007), lower creatinine clearance (HR: 0.98 (95% CI:0.97-0.98): P < 0.001), non-obese patients on warfarin (HR:3.51 (95%CI:1.6-7.7): P = 0.002) and obese patients on warfarin (HR: 6.7 (95% CI:2.51-17.92); P < 0.001). Conclusion: NOACs could have a similar risk profile to warfarin in obese and non-obese patients with non-valvular AF but could have better survival. Larger randomized trials are recommended.

Concomitant intra-aortic balloon pump and veno-arterial extracorporeal membrane oxygenation for postcardiotomy cardiogenic shock.

We aimed to compare the outcomes of ECMO with and without IABP for postcardiotomy cardiogenic shock. The study included 103 patients who needed ECMO for postcardiotomy cardiogenic shock. Patients were grouped according to the use of IABP into ECMO without IABP (n = 43) and ECMO with IABP (n = 60). The study endpoints were hospital complications, successful weaning, and survival. Patients with IABP had lower preoperative ejection fraction (p = 0.002). There was no difference in stroke (p = 0.97), limb ischemic (p = 0.32), and duration of ICU stay (p = 0.11) between groups. Successful weaning was non-significantly higher with IABP (36 (60%) vs 19 (44.19%); p = 0.11). Predictors of successful weaning were inversely related to the high pre-ECMO lactate levels (OR: 0.89; p = 0.01), active endocarditis (OR: 0.06; p = 0.02), older age (OR: 0.95; p = 0.02), and aortic valve replacement (OR: 0.26; p = 0.04). There was no difference in survival between groups (p = 0.80). Our study did not support the routine use of IABP during ECMO support.

Sepsis in postcardiotomy cardiogenic shock patients supported with veno- arterial extracorporeal membrane oxygenation.

BACKGROUND: Sepsis could affect the outcomes of patients with postcardiotomy cardiogenic shock supported with extracorporeal membrane oxygenation (ECMO). Our objectives were to characterize sepsis patients with ECMO support for postcardiotomy cardiogenic shock and assess its predictors and effect on patients' outcomes. METHODS: This retrospective study included 103 patients with ECMO for postcardiotomy cardiogenic shock from 2009 to 2020. Patients were divided according to the occurrence and timing of sepsis into three groups. Group 1 included patients with no sepsis (n = 67), Group 2 included patients with ECMO-related sepsis (n = 10), and Group 3 included patients with non-ECMO-related sepsis (n = 26). RESULTS: Lactate level before ECMO was highest in the ECMO-associated sepsis group (Group 1 and 2 p = 0.003 and Group 2 and 3 p = 0.003). Dialysis and gastrointestinal bleeding were highest in ECMO-associated sepsis (p = 0.03 and 0.04, respectively). Blood transfusion was higher in ECMO-associated sepsis than in patients with no sepsis (p = 0.01). Mortality was nonsignificantly higher in patients with ECMO-associated sepsis. High BMI (OR: 1.11; p = 0.004), preoperative dialysis (OR: 7.35; p = 0.02), preoperative IABP (OR: 9.9.61; p = 0.01) and CABG (OR: 6.29; p = 0.01) were significantly associated with sepsis. Older age (OR: 1.08; p = 0.004), lower BSA (OR: 0.004; p = 0.003), peripheral cannulation (OR: 29.82; p = 0.03), and high pre ECMO lactate level (OR: 1.24; p = 0.001) were associated with increased mortality. Sepsis did not predict mortality (OR: 1.83; p = 0.21). CONCLUSIONS: Sepsis is a dreaded complication in patients with postcardiotomy cardiogenic shock, especially ECMO-associated sepsis. Preoperative risk factors could predict postoperative sepsis in ECMO patients.

Surgical vs Transcatheter Aortic Valve Replacement in Patients With a Low Ejection Fraction.

Currently, there is no preference for surgical (SAVR) vs transcatheter (TAVR) aortic valve replacement in patients with low ejection fraction (EF). The present study retrospectively compared the outcomes of SAVR vs TAVR in patients with EF ≤40% (70 SAVR and 117 TAVR patients). Study outcomes were survival and the composite endpoint of stroke, aortic valve reintervention, and heart failure readmission. The patients who had TAVR were older (median: 75 (25-75th percentiles: 69-81) vs 51 (39-66) years old; P < .001) with higher EuroSCORE II (4.95 (2.99-9.85) vs 2 (1.5-3.25); P < .001). Postoperative renal impairment was more common with SAVR (8 (12.5%) vs 4 (3.42%); P = .03), and they had longer hospital stay [9 (7-15) vs 4 (2-8) days; P < .001). There was no difference between groups in stroke, reintervention, and readmission (Sub-distributional Hazard ratio: .95 (.37-2.45); P = .92). Survival at 1 and 5 years was 95% and 91% with SAVR and 89% and 63% with TAVR. Adjusted survival was comparable between groups. EF improved significantly (ß: .28 (.23-.33); P < 0.001) with no difference between groups (P = .85). In conclusion, TAVR could be as safe as SAVR in patients with low EF.

Time in therapeutic range for virtual anticoagulation clinic versus in-person clinic during the COVID-19 pandemic: a crossover study.

BACKGROUND: COVID-19 infection affects the quality of the medical services globally. The pandemic required changes to medical services in several institutions. We established a virtual clinic for anticoagulation management during the pandemic using the Whatsapp application. OBJECTIVES: Compare anticoagulation management quality in virtual versus in-person clinics. DESIGN: A retrospective crossover study SETTINGS: Specialized cardiac care center PATIENTS AND METHODS: The study included patients who presented to Prince Sultan Cardiac Center in Riyadh for anticoagulation management during the pandemic from March 2020 to January 2021. We compared time in therapeutic range (TTR) in the same patients during virtual and in-person clinics. All international normalized ratio (INR) measures during the virtual clinic visits and prior ten INR measures from the in-person clinic were recorded. Patients who had no prior follow-up in the in-person clinic were excluded. MAIN OUTCOME MEASURE: TTR calculated using the Rosendaal method. SAMPLE SIZE: 192 patients RESULTS: The mean age was 58.6 (16.6) years and 116 (60.4%) were males. Patients were diagnosed with atrial fibrillation (n=101, 52.6%), mechanical mitral valve (n=88, 45.8%), mechanical aortic valve (n=79, 41%), left ventricular thrombus (n=5, 2.6%) and venous thromboembolism (n=8, 4.2%). Riyadh residents represented 56.7% of the study population (n=93). The median (IQR) percent TTR was 54.6 (27.3) in the in-person clinic versus 50.0 (33.3) (P=.07). CONCLUSION: Virtual clinic results were comparable to in-person clinics for anticoagulation management during the COVID-19 pandemic. LIMITATIONS: Number of INR measures during the virtual clinic visits, retrospective nature and single-center experience. CONFLICT OF INTEREST: None.