Use of Web-Based Patient Portals in Patients With Atrial Fibrillation Is Associated With Higher Readmissions.

Background: The impact of web-based patient portals on patient outcomes-specifically hospital readmissions in patients with atrial fibrillation (AF)-remains understudied. Methods: This single-center retrospective cohort study investigated the use of an online portal system (MyChart) by patients hospitalized from January 1, 2014 to June 30, 2017 for AF. During the study period, 11,334 unique AF admissions were identified; 50.3% were MyChart users and 49.7% were non-MyChart users. Patients who experienced inpatient mortality were excluded. The study groups were analyzed for demographic variables, comorbidities, readmission rates, and the frequency of MyChart use during the 3.5-year time frame. Results: MyChart users were younger (median age, 74 years, interquartile range [IQR] 66-82 vs 77 years, IQR 68-85; P<0.0001) and more likely to be white (91.9% vs 84.6%; P<0.0001), but the sex distribution was similar between groups, with 51.8% males in the MyChart group vs 53.2% in the non-MyChart group. MyChart users had a significantly higher rate of readmission compared to non-MyChart users at 1 year (43.0% vs 32.0%, respectively; P<0.0001). MyChart users who were readmitted had a higher median number of logins to MyChart (121 [IQR 32-270.5]) than MyChart users who were not readmitted (91 [IQR 26-205]; P<0.0001). Multivariable regression analysis demonstrated that MyChart use was associated with readmission (odds ratio 1.57, 95% CI 1.49-1.70; P<0.0001). Conclusion: Among patients with AF, MyChart use was associated with higher readmissions in this single-center cohort. Use and benefit of bespoke portals require further study.

Inpatient Mortality and 30-Day Readmission Rates Associated with Troponin Testing in Patients without Acute Myocardial Infarction.

OBJECTIVE: Troponin values above the threshold established to diagnose acute myocardial infarction (AMI; >99th percentile) are commonly detected in patients with diagnoses other than AMI. The objective of this study was to compare inpatient mortality and 30-day readmission rate in patients with troponin I (TnI) above and below the 99th percentile in those with type 1 AMI and type 2 myocardial injury. METHODS: Between January 1, 2016 and December 31, 2016, there were 56,895 inpatient hospitalizations; of these 14,326 (25.2%) patients received troponin testing. We evaluated mortality and readmissions in the entire cohort based on the primary discharge International Classification of Diseases, Tenth Edition (ICD-10) diagnosis and grouped into type 1 AMI versus other diagnoses comprising the type 2 AMI group (including ICD-10 codes for congestive heart failure, sepsis, and other). Among those with TnI drawn, we evaluated in-hospital mortality and 30-day readmissions based on troponin values > 99th percentile (≥ 0.1 ng/ml). RESULTS: Among the entire cohort, the inpatient mortality rate was significantly higher in those with TnI testing (5.0%, 95% CI 4.6%-5.3%) compared to those without testing (0.7%, 95% CI 0.6%-0.7%, P < 0.01). In the tested cohort 3,743 (26%) patients had troponin levels above the 99th percentile (> 0.1 ng/ml), and 10,583 (74%) had troponin levels below the 99th percentile (≤ 0.1 ng/ml). Comparing type 2 AMI with type 1 AMI and troponin testing, TnI values ≥ 0.1 ng/ml were associated with higher inpatient mortality (11.6% vs. 3.9%) and 30-day readmission rates (16.9% vs. 10.7%). CONCLUSIONS: A higher inpatient mortality and 30-day readmission rates were found in patients with type 2 AMI compared to type 1 AMI group.

A delayed diagnosis of aortic coarctation.

Coarctation of the aorta is most often diagnosed in early childhood, with infrequent recorded presentations of previously undiagnosed adults. We present a young female hospitalized with hypertensive emergency who was then diagnosed with a stenotic bicuspid aortic valve requiring surgical intervention. Subsequent preoperative coronary angiogram led to discovery of an undiagnosed coarctation of the aorta, which is commonly a forgotten cause of secondary hypertension.

Rates of Echocardiography, Coronary Angiography, and Coronary Intervention Associated With Troponin Testing in Hospitalized Patients.

Diagnosis of acute myocardial infarction (AMI) often depends on detection of cardiac troponin elevation >99th percentile. However, troponin elevation is commonly found in patients without AMI. We have previously reported an association between troponin elevation and rates of electrocardiogram (ECG), echocardiography (ECHO), and coronary angiography (CAG) in patients with a primary diagnosis of sepsis. We hypothesized that elevated troponin might be associated with greater use of ECHO and CAG in primary diagnoses other than sepsis and that this correlation might also include percutaneous coronary intervention (PCI). We reviewed all inpatient admissions to nine hospitals in Texas in 2016 collecting primary International Statistical Classification of Diseases and Related Health Problems (International Classification of Diseases-10) diagnoses, troponin test data, and the presence of ECHO, CAG, or PCI during hospitalization. We identified 56,895 unique inpatient admissions, of which 14,326 (25.2%) were associated with troponin testing. Of patients tested, 26.1% had one or more troponin I values ≥0.1 ng/ml (99th percentile). Primary ICD-10 diagnoses were grouped into (1) AMI, (2) primary diagnosis other than AMI (non-AMI), (3) congestive heart failure (CHF), (4) sepsis, and (5) Other excluding AMI, CHF, or sepsis. Troponin testing was itself associated with greater utilization of ECHO, CAG, and PCI in all groups except CHF. Troponin I values ≥0.1 ng/ml were associated with increased rates of ECHO, CAG, and PCI across all groups.

Aortic valve perforation secondary to blunt force trauma.

Blunt chest trauma has seldom been reported as a cause of rupture of an aortic valve cusp. We report the case of a 63-year-old man who had a motor vehicle collision resulting in transection of the descending thoracic aorta, splenic pseudoaneurysm, and rupture of an aortic valve cusp causing severe aortic regurgitation. Despite replacement of the aortic valve, he died of multiorgan failure.

Overuse of Troponin? A Comprehensive Evaluation of Testing in a Large Hospital System.

Troponin assays are integral to the diagnosis of acute myocardial infarction (AMI), but there is concern that testing is over utilized and may not conform to published guidelines. We reviewed all testing performed at 14 hospitals over 12 months and associated troponin values with the primary and secondary diagnoses for each visit. Troponin was determined to be negative, indeterminate or elevated based on reference ranges. The majority of troponin measurements were single, not serial (64%). The rate of AMI was low, with only 3.5% of tested patients having a primary or secondary diagnosis of AMI. Sensitivity, specificity and negative predictive value were excellent, exceeding 90%. However, positive predictive value was low, suggesting testing of populations with diseases known to be associated with elevated troponin levels in the absence of AMI. The majority (79%) of elevated troponin values were associated with primary diagnoses other than AMI. Only 28% of elevated troponins were associated with a primary or secondary diagnosis of AMI. These data suggest possible overuse of troponin testing in our healthcare system. Journal of Hospital Medicine 2017;12:329-331.