Citations

Background: Prior studies have shown that hospital case volume is not associated with survival in patients with out-of-hospital cardiac arrest (OHCA). However, how case volume impact on survival for in-hospital cardiac arrest (IHCA) is unknown Methods: We queried the National Inpatient Sample (NIS) in the U.S. 2005-2011 to identify cases in which in-hospital CPR was performed for IHCA. Years > 2011 were excluded due to redesign of NIS that precludes case volume calculation. Restricted cubic spine was used to evaluate the association between hospital annual CPR volume and survival to hospital discharge. Further analysis was conducted with case volume in quartiles. Results: Across more than 1000 hospitals in NIS, we identified 137,466 cases (mean age 67, 45% female) of IHCA for which CPR was performed over the study period. Median [Q1, Q3] case volume was 68 [34, 100]. Compared to those in the 1 st quartile (q1) of case volume, hospitals in the 4 th quartile (q4) tends to have younger patients (mean=66 vs 68 yrs), higher comorbidities (median Elixhauser score=4 vs 3), large bed size (89 vs 37%), and in low income areas (37 vs 32%). After adjustment for patient and hospital factors, higher hospital case volume was inversely associated with lower rates of survival (Fig1). Risk-adjusted rates of survival from q1 through q4 were: 28.1%, 25.5%, 25.4% and 23.7%. We arrived at similar results when analysis was stratified by age, gender and hospital bed size (not shown) except that the difference across quartiles was more pronounced among small bed size hospitals (survival rate=27.4% in q1 vs 8.1% in q4). However, among those who survived to hospital discharge, nonroutine home discharge was higher among patients in q1 (73.9%) vs q4 (69.6%) Conclusion: Unlike OHCA, hospital case volume is inversely associated with survival to hospital discharge in patients undergoing CPR for IHCA. Hence, quality measures to reduce the incidence of CPR/IHCA have the potential to reduce in-hospital mortality

5-Fluorouracil (5-FU) is the third most common chemotherapeutic agent for treating solid cancers and the second most common to cause cardiotoxicity. We present a rare case of acute reversible severe left ventricular systolic dysfunction associated with 5-FU. A 54-year-old woman with a history of stage IV gastric cancer presented with features of transient ischaemic attack after receiving the first dose of FLOT (5-FU, leucovorin, oxaliplatin and docetaxel). During the diagnostic workup, it was found that her ejection fraction was severely reduced to 15% with features of global hypokinesis, which later improved back to 65% within 13 days. These cases challenge our current understanding of the underlying mechanisms of this cardiotoxicity. Additionally, even though the patient did not experience any cardiac symptoms, it is important to monitor these patients closely as they are at high risk for fatal complications like arrhythmia and thrombus formation.

Background Evidence exists for racial/ethnic differences in left ventricular mass index (LVMI). How this translates to future cardiovascular disease (CVD) events is unknown. Hypothesis The impact of racial/ethnic differences in LVMI on incident cardiovascular outcomes could have potential implications for the optimization of risk stratification strategies. Methods Using the prospectively collected database of the Multi‐Ethnic Study of Atherosclerosis (MESA) involving 4 racial/ethnic groups (non‐Hispanic Whites, Chinese, Blacks, and Hispanics) free of CVD at baseline, we assessed for racial/ethnic differences in the relationship between LVMI and incident CVD using a Cox model. Results 5004 participants (mean age, 62 ± 10 years; 48% male) were included in this study. After an average follow‐up of 10.2 years, 369 (7.4%) CVD events occurred. Significant racial/ethnic differences existed in the relationship between LVMI and incident CVD ( P for interaction = 0.04). Notably, the relationship was strongest for Chinese (HR per 10‐unit increase in LVMI: 1.7, 95% CI: 1.1–2.8) and Hispanics (HR per 10‐unit increase in LVMI: 1.9, 95% CI: 1.5–2.2). Non‐Hispanic Whites demonstrated the lowest relationship (HR: 1.3, 95% CI: 1.1–1.5). LVMI values of 36.9 g/m 2.7 , 31.8 g/m 2.7 , 39.9 g/m 2.7 , and 41.7 g/m 2.7 were identified as optimal cutpoints for defining left ventricular hypertrophy (LVH) for non‐Hispanic Whites, Chinese, Blacks, and Hispanics, respectively. In secondary analysis of LVH (vs no LVH) using these optimal cutpoints, we found a similar pattern of association as above ( P for interaction = 0.04). For example, compared with those without LVH, Chinese with LVH had HR: 5.3, 95% CI: 1.6–17, whereas non‐Hispanic Whites with LVH had HR: 1.6, 95% CI: 1.2–2.1 for CVD events. Conclusions Among 4 races/ethnicities studied, LVMI has more prognostic utility predicting future CVD events for Chinese and Hispanics and is least significant for non‐Hispanic Whites.

Background To investigate heart failure ( HF ) hospitalization trends in the United States and change in trends after publication of management guidelines. Methods and Results Using data from the National Inpatient Sample and the US Census Bureau, annual national estimates in HF admissions and in‐hospital mortality were estimated for years 2001 to 2014, during which an estimated 57.4 million HF ‐associated admissions occurred. Rates (95% confidence intervals) of admissions and in‐hospital mortality among primary HF hospitalizations declined by an average annual rate of 3% (2.5%–3.5%) and 3.5% (2.9%–4.0%), respectively. Compared with 2001 to 2005, the average annual rate of decline in primary HF admissions was more in 2006 to 2009 (ie, 3.4% versus 1.1%; P =0.02). In 2010 to 2014, primary HF admission continued to decline by an average annual rate of 4.3% (95% confidence interval, 3.9%–5.1%), but this was not significantly different from 2006 to 2009 ( P =0.14). In contrast, there was no further decline in in‐hospital mortality trend after the guideline‐release years. For hospitalizations with HF as the secondary diagnosis, there was an upward trend in admissions in 2001 to 2005. However, the trend began to decline in 2006 to 2009, with an average annual rate of 2.4% (95% confidence interval, 0.8%–4%). Meanwhile, there was a consistent decline in in‐hospital mortality by an average annual rate of 3.7% (95% confidence interval, 3.3%–4.2%) during the study period, but the decline was more in 2006 to 2009 compared with 2001 to 2005 (ie, 5.4% versus 3.4%; P <0.001). Beyond 2009, admission and in‐hospital mortality rates continued to decline, although this was not significantly better than the preceding interval. Conclusions From 2001 to 2014, HF admission and in‐hospital mortality rates declined significantly in the United States; the greatest improvements coincided with the publication of the 2005 American College of Cardiology/American Heart Association HF guidelines.

AbstractObjectivesTo assess the in‐hospital mortality and complications in female between transcatheter aortic valve replacement (TAVR) and surgical aortic valve replacement (SAVR).BackgroundFemale is one of the risk factors for increased adverse events in cardiac surgery.Methods and resultsNationwide Inpatient Sample database was queried from 2011 to 2014 for patients who underwent TAVR or SAVR in female patients. The primary endpoint was in‐hospital all‐cause mortality and second endpoints were perioperative complications. We performed a propensity score analysis to calculate the adjusted odds ratio (OR) for each outcome. Patients who had concomitant cardiac surgery and those who had TAVR or SAVR mainly for aortic regurgitation were excluded. Our query from 2011 to 2014 resulted in a total of 3,067 TAVR and 18,594 SAVR in female patients. TAVR patients were in general elder and had a higher burden of comorbidities. The primary endpoint was similar between TAVR and SAVR (4.2% vs. 3.9%, OR 1.0, P = 0.89). Compared to SAVR, female TAVR patients had less hemorrhage requiring transfusion (12% vs. 21%, OR 0.41, P < 0.001), perioperative cardiac arrest and nonfatal myocardial infarction (9.8% vs. 17%, OR 0.38, P < 0.001), respiratory complication (1.6% vs. 4.4%, OR 0.28, P < 0.001), post‐op sepsis (1.7% vs. 2.9%, OR 0.65, P = 0.03), acute myocardial infarction (3.0% vs. 4.9%, OR 0.60, P < 0.001), and acute kidney injury (15% vs. 18%, OR 0.62, P < 0.001). Conversely, female TAVR patients had significantly increased risk of new pacemaker implantation (11% vs. 5.9%, OR 1.7, P < 0.001) and use of extracorporeal membrane oxygenation (0.66% vs. 0.24%, OR 2.8, P < 0.001). TAVR patients had less nonroutine discharge. The median hospital cost was significantly higher in TAVR than SAVR (median $51,274 vs. $43,677, P < 0.001) but the length of stay was shorter (mean 7.8 days vs. 10.5 days).ConclusionsTAVR may be a better option for those patients with underlying comorbidities that predispose them at higher risk for complications that was less observed in TAVR group. However, higher cost and increased risk of need for extracorporeal membrane oxygenation, although rare, should be taken into consideration upon deciding the optimal mode for aortic valve replacement.

AbstractBackgroundTo assess the impact of post transcatheter aortic valve implantation (TAVI) mild paravalvular regurgitation (PVR) on mortality. More than moderate PVR after TAVI has decreased with the advent of new‐generation prosthetic valves. However, mild PVR remains common and its clinical impact has been inconsistent. We aimed to assess the impact of mild PVR through meta‐analysis.Methods and ResultsA systematic literature search was conducted through PUBMED and EMBSE. Manuscripts that reported hazard ratio (HR) with 95% confidence interval (CI) for clinical outcome of interest (all‐cause and cardiac mortality) has been included. Random‐effects model was used for calculation of HR. A total of 25 articles including total of 21,018 patients were finally included for quantitative synthesis (meta‐analysis). Our pooled analysis demonstrated higher all‐cause mortality in patients with mild PVR compared to none/trivial PVR (HR 1.26, 95%CI 1.11–1.43, I2=45%, p < 0.001) (follow up duration range 6 months to 5 years). Significant heterogeneity among studies was observed (p for heterogeneity = 0.005). Egger's test showed no evidence of publication bias. Cardiovascular mortality was increased in patients with mild PVR compared with none/trivial PVR (HR 1.28, 95%CI 1.05–1.57, I2=8%, p = 0.02) (follow up duration range 1–3 years).ConclusionsMild PVR was associated with increased all‐cause and cardiovascular mortality after TAVI. Whether further interventions in mild PVR is of benefit, has yet to be determined.

AbstractObjectivesTo summarize the published data of combined transcatheter aortic and mitral valve intervention (CTAMVI).BackgroundCTAMVI, a combination of either transcatheter aortic valve replacement (TAVR) or transcatheter aortic valve‐in‐valve (TAViV) and transcatheter mitral valve replacement (TMVR), transcatheter mitral valve‐in‐valve/valve‐in‐ring (TMViV/ViR), or percutaneous mitral valve repair (PMVR) is an attractive alternative in high‐surgical risk patients with combined aortic and mitral valve disease. However, its procedural details and clinical outcomes have not been well described.MethodsWe performed a systematic review of all the published articles from PUBMED and EMBASE.ResultsA total of 37 studies with 60 patients were included. The indication for CTAMVI was high or inoperable surgical risk and symptomatic severe aortic stenosis (92%) or severe aortic regurgitation (8%) combined with moderate to severe/severe mitral stenosis (30%) or moderate/severe mitral regurgitation (65%) or both (5%). In majority of the cases, aortic valve intervention was performed prior to the mitral valve. Mortality rate were 25% for TAVR + TMVR (range 42 days to 10 months), 17% for TAVR + TMViV/ViR (range 13 days to 6 months), 0% for TAViV + TMViV/ViR (range 6–365 days), and 15% for TAVR/ViV + PMVR (range 17 days to 419 days). Significant (more than moderate) paravalvular regurgitation post‐procedure was rare.ConclusionsCTAMVI appears to confer reasonable clinical outcome. Further large study is warranted to clarify the optimal strategy, procedural details and clinical outcomes in the future.

AbstractBackgroundEvidence suggests that medical service offerings vary by hospital teaching status. However, little is known about how these translate to patient outcomes. We therefore sought to evaluate this gap in knowledge in patients undergoing Transcatheter aortic valve replacement (TAVR) in the United States.MethodsThis study was conducted using the National Inpatient Sample (NIS) in the United States from 2011 to 2014. Teaching status was classified, as teaching vs. nonteaching and endpoints were clinical outcomes, length of stay and cost. Procedure‐related complications were identified via ICD‐9 coding and analysis was performed via mixed effect model.ResultsAn estimated 33,790 TAVR procedures were performed in the U.S between 2011 and 2014, out of which 89.3% were in teaching hospitals. Mean (SD) age was 81.4 (8.5) and 47% were females. There was no significant difference between teaching versus nonteaching hospitals in regards to the primary outcome of in‐hospital mortality and secondary outcomes of several cardiovascular and other end points except for a high rates of acute kidney injury (AKI) (OR: 1.34 [95% CI, 1.04–1.72]) and lower rate for use of mechanical circulatory support devices in teaching vs. nonteaching centers. The mean length of stay was significantly higher in teaching hospitals (7.7 days) vs. nonteaching hospitals (6.8 days) (P = 0.002) and so was the median cost of hospitalization (USD 50,814 vs. USD 48, 787, P = 0.02) for teaching vs. nonteaching centers.ConclusionMost TAVR related short‐term outcomes including all cause in‐hospital mortality are about the same in teaching and nonteaching hospitals. However, AKI, length of hospital stay and TAVR related cost were significantly higher in teaching than nonteaching hospitals. There was more use of mechanical circulatory support in nonteaching than teaching hospitals.

BACKGROUNDThere is a concerted push for adopting a minimalist strategy with emphasis on early hospital discharge for patients undergoing Transcatheter aortic valve implantation (TAVI). However, studies on discharge patterns and predictors of early discharge (≤3 days post‐TAVI) are sparse, in the United States.METHODSWe analyzed using Healthcare Utilization Project, Nationwide Inpatient Sample database, 2011‐2012. A total of 7321 TAVI procedures were identified. We compared in‐hospital outcomes between early and late discharge cohorts, and determined the predictors of early discharge. Correlation of costs and post‐TAVI length of stay was also performed.RESULTSEarly discharge rate post‐TAVI was about 21% in the United States, in 2011‐2012. Overall mean age was 81 years. In‐hospital adverse outcomes post‐TAVI were higher in late discharge cohort (P < 0.001). Mean length of stay post‐TAVI (7.7 days vs 2.6 days) and costs ($208 752 vs $157 663) were significantly higher in late discharge than early discharge cohort. Females, bleeding, blood transfusions, stroke, permanent pacemakers, mechanical circulatory support, acute kidney injury were associated with significantly lower adjusted odds for early discharge. Transfemoral TAVI approach, prior aortic valvuloplasty, and procedure year 2012 were associated with significantly higher odds for early discharge. We observed positive correlation between costs of hospitalization and post‐TAVI length of stay (R = 0.58; P < 0.001).CONCLUSIONSFemales, bleeding, blood transfusions, stroke, permanent pacemakers, mechanical circulatory support devices, renal failure were associated with lower odds for early discharge. Transfemoral approach and prior aortic valvuloplasty increased the likelihood for early discharge. Post‐TAVI length of stay was associated with significantly higher hospitalization costs.