Evaluation of terlipressin-related patient outcomes in hepatorenal syndrome-acute kidney injury using point-of-care echocardiography.

BACKGROUND AND AIMS: Treatment of hepatorenal syndrome-acute kidney injury (HRS-AKI), with terlipressin and albumin, provides survival benefits, but may be associated with cardiopulmonary complications. We analyzed the predictors of terlipressin response and mortality using point-of-care echocardiography (POC-Echo) and cardiac and renal biomarkers. APPROACH: Between December 2021 and January 2023, patients with HRS-AKI were assessed with POC-Echo and lung ultrasound within 6 hours of admission, at the time of starting terlipressin (48 h), and at 72 hours. Volume expansion was done with 20% albumin, followed by terlipressin infusion. Clinical data, POC-Echo data, and serum biomarkers were prospectively collected. Cirrhotic cardiomyopathy (CCM) was defined per 2020 criteria. RESULTS: One hundred and forty patients were enrolled (84% men, 59% alcohol-associated disease, mean MELD-Na 25±SD 5.6). A median daily dose of infused terlipressin was 4.3 (interquartile range: 3.9-4.6) mg/day; mean duration 6.4 ± SD 1.9 days; the complete response was in 62% and partial response in 11%. Overall mortality was 14% and 16% at 30 and 90 days, respectively. Cutoffs for prediction of terlipressin nonresponse were cardiac variables [ratio of early mitral inflow velocity and mitral annular early diastolic tissue doppler velocity > 12.5 (indicating increased left filling pressures, C-statistic: 0.774), tissue doppler mitral velocity < 7 cm/s (indicating impaired relaxation; C-statistic: 0.791), > 20.5% reduction in cardiac index at 72 hours (C-statistic: 0.885); p < 0.001] and pretreatment biomarkers (CysC > 2.2 mg/l, C-statistic: 0.640 and N-terminal proBNP > 350 pg/mL, C-statistic: 0.655; p <0.050). About 6% of all patients with HRS-AKI and 26% of patients with CCM had pulmonary edema. The presence of CCM (adjusted HR 1.9; CI: 1.8-4.5, p = 0.009) and terlipressin nonresponse (adjusted HR 5.2; CI: 2.2-12.2, p <0.001) were predictors of mortality independent of age, sex, obesity, DM-2, etiology, and baseline creatinine. CONCLUSIONS: CCM and reduction in cardiac index, reliably predict terlipressin nonresponse. CCM is independently associated with poor survival in HRS-AKI.

Clinical factors associated with physician choice of femoral versus radial access: A real-world experience from a single academic center.

OBJECTIVES: To analyze clinical factors associated with operator's preference in selection of femoral versus radial access for angiography and percutaneous intervention (PCI) procedures. BACKGROUND: There has been an increase in radial access in cardiac catheterization and PCI in the last few decades. METHODS: Data from 11 226 consecutive cardiac catheterization procedures were collected from Sanford University Medical Center (University of South Dakota, Sanford School of Medicine) from 2011 to 2015. RESULTS: In the overall cases, clinical factors that favored upfront femoral access include patients presenting as ST-elevation myocardial infarction (STEMI) or emergent, coronary artery bypass graft, body mass index (BMI) <30 kg/m2 and age ≥70 years, whereas morbidly obese patients (BMI ≥35) and age <70 favored upfront radial access. Radial access in the overall group had lower fluoroscopy time (6.5 vs 8.4 min, P < 0.0001) and lower contrast use (68.8 vs 80.6 cc, P < 0.0001). In the PCI group, efficacy of upfront radial access is less evident with radial fluoroscopy time (10.1 vs 11.0 min, P < 0.0028) and contrast use being higher in radial group (113.8 vs 108.2 cc, P < 0.037). Interventional cardiologists were more efficient in diagnostic cases than non-interventional cardiologists. CONCLUSION: STEMI or emergent cases and elderly patients favor upfront femoral access. As BMI increases and age decreases, radial access is progressively favored. In diagnostic cases, radial access appears to be superior to femoral access in efficacy, but the distinction is less obvious in PCI and STEMI or emergent cases.

AngioVac System Used as an Adjunct Treatment for Intra-Cardiac Lead and Valvular Vegetations.

Infections are known complications of cardiovascular implantable electronic devices (CIEDs). We describe a case of a 62-year-old male who presented with pulseless electrical activity (PEA) cardiac arrest and respiratory failure. He had a history of cardiac resynchronization device and defibrillator (CRT-D) implantation for nonischemic cardiomyopathy. After resuscitation, he was found to have methicillin sensitive Staphylococcus aureus (MSSA) bacteremia on blood culture and large vegetations on the CRT-D lead and tricuspid valve found on echocardiography. The patient underwent extraction of the leads, but several large vegetations were present adherent to the tricuspid valve on intra-cardiac ultrasound (ICE). Due to comorbidities, the patient was not a candidate for surgical removal of these vegetations. Thus, he underwent percutaneous extraction of tricuspid and right atrial vegetations with the AngioVac device.

Single Coronary Artery Arising from the Right Sinus of Valsalva and the Role of Coronary Computed Tomography Angiography.

There are many variations of coronary anatomy encountered during coronary angiogram. Anatomy demonstrating a single coronary artery is a rare congenital coronary artery anomaly. The entire heart is supplied solely by a coronary artery with single coronary ostium. We present a rare case of single coronary artery arising from the right sinus of Valsalva. The patient had presented with atypical chest pain and a stress test was performed, which was abnormal. We proceeded with coronary angiography which showed a common ostium of the right and left coronary artery coming from the right coronary cusp. The coronary computed tomography angiography revealed the left main had a pre-pulmonic course, crossing the base of the heart and passing anterior to the pulmonary artery and then branching into the left anterior descending artery and left circumflex artery. Patients with single coronary artery usually has benign prognosis; however, a specific coronary anomaly may result in myocardial ischemia and sudden cardiac death if the anomalous coronary artery takes an intra-arterial course, running between the aorta and the pulmonary artery. Coronary computed tomography angiography is a useful imaging modality to identify anatomical course of coronary anomaly.

A Case of an Acute Myocardial Infarction Post Thrombolytic Treatment of Ischemic Stroke - A Management Dilemma.

Acute ischemic stroke and myocardial infarction are emergency clinical events that require prompt intervention. Concurrent occurrence of both events magnifies the complexity of the clinical management. We present a case of a patient who presented with acute ischemic stroke, complicated by acute myocardial infarction shortly after thrombolytic was administered. This case highlights the importance of individualization of management especially in complex cases where there are no clear specific guidelines to follow.

Simultaneous Onset of Deep Vein Thrombosis, Pulmonary Embolism, Cerebral Infarction, and Myocardial Infarction in a Patient with Patent Foramen Ovale.

Paradoxical embolism is a known complication with intra-cardiac shunts. It should be considered in the differential as the pathophysiologic mechanism of simultaneous thromboembolism in the venous and systemic vasculature. We present a case of simultaneous deep venous thrombosis, pulmonary embolism and myocardial infarction in the presence of a confirmed patent foramen ovale on echocardiography. Thrombolytic therapy was administered. Subsequent concerns of intracranial hemorrhage on imaging of the brain complicated the management and added to the challenge of co-managing the clot burden in our patient. This rare presentation highlights the importance of multisystem evaluation in making the best medical decision for the patient.

A Primer on Bleeding Risk and Management Strategies of Newer Oral Anti Platelet Agents in Cardiovascular Disease.

Aspirin, the first antiplatelet agent, has been around since the 19th century, and is one of the most established drugs in history. With the improvement of coronary interventions in the past few decades, there has been more reliance on oral antiplatelet agents to reduce complications of in-stent restenosis/thrombosis. Clopidogrel was initially introduced in 1997, and within the past seven years, two additional oral antiplatelet agents have been approved by the U.S. Food and Drug Administration. With more potent antiplatelet agents comes increased risks of adverse effects. Physicians of all fields should be aware of the common antiplatelet agents used today, and the basic landmark trials that allowed them to be on the market today. The focus of this review article is to evaluate each oral antiplatelet drug, its brief history, relevant trials, indications and management of complications through evidence based guidelines.

A Case of Post Myocardial Infarction Papillary Muscle Rupture.

Papillary muscle rupture is a rare, life-threatening post myocardial infarction mechanical complication. Without surgical intervention, prognosis is very poor. Clinicians need to recognize this complication early, as prompt therapy is crucial. We present a case of inferior ST elevation myocardial infarction complicated by posteromedial papillary muscle rupture resulting in severe acute mitral regurgitation (flail anterior mitral leaflet), acute pulmonary edema and cardiogenic shock. In our patient, a new mitral regurgitation murmur suggested this mechanical complication. Complete disruption of papillary muscle was visualized by transesophageal echocardiography. This case illustrates the importance of good physical examination for early diagnosis of papillary muscle rupture, so that life-saving treatment can be administered without delay.

Acute Stent Fracture During Balloon Post Dilation of an Everolimus Eluting Stent.

Coronary artery stent fracture is a well described complication during percutaneous intervention, with rates ranging from 0.84 to 8.4 percent in first generation drug eluting stents. Complications of stent fractures usually present with symptoms of acute coronary syndrome or progressive angina days, months to years after initial implantation. We present a case of an acute stent fracture during post balloon dilation of an everolimus eluting stent at a critical stenosis junction of a saphenous vein graft to the first diagonal of the left anterior descending artery. A shorter oversized drug eluting stent was placed to cover the stent fracture with good angiographic results. To our knowledge, this is the first incidence in literature of an acute stent fracture in a saphenous vein graft.

Creation of a new longitudinal corpus of clinical narratives.

The 2014 i2b2/UTHealth Natural Language Processing (NLP) shared task featured a new longitudinal corpus of 1304 records representing 296 diabetic patients. The corpus contains three cohorts: patients who have a diagnosis of coronary artery disease (CAD) in their first record, and continue to have it in subsequent records; patients who do not have a diagnosis of CAD in the first record, but develop it by the last record; patients who do not have a diagnosis of CAD in any record. This paper details the process used to select records for this corpus and provides an overview of novel research uses for this corpus. This corpus is the only annotated corpus of longitudinal clinical narratives currently available for research to the general research community.

Renal artery stenosis: to intervene, or not to intervene, "that is the question".

Renal artery stenosis (RAS) due to atherosclerosis continues to be a major cause of secondary hypertension. It can also lead to renal dysfunction due to ischemic nephropathy. While major clinical trials have emphasized that medical management should be preferred over angioplasty and stenting for the treatment of renal artery stenosis, clinical scenarios continue to raise doubts about the optimal management strategy. Herein, we present two cases that were admitted with hypertensive emergency and renal function deterioration. Medical therapy failed to control the blood pressure and in one patient, renal failure progressed to a point where renal replacement therapy was required. Both patients underwent angioplasty (for >90% stenosis) and stent insertion with successful resolution of stenosis by interventional radiology. Postoperatively, blood pressure gradually decreased with improvement in serum creatinine. Dialysis therapy was discontinued. At 4- and 8-month follow-up, both patients continue to do well with blood pressure readings in the 132-145/70-90 mmHg range. This article highlights the importance of percutaneous interventions in the management of atherosclerotic RAS and calls for heightened awareness and careful identification of candidates who would benefit from angioplasty and stent insertion.

The low loading of metal in metal-organic framework-derived NiNx@NC promotes amide formation through C-N coupling.

The pyrolysis of Ni-substituted zeolitic imidazolate framework-8 produces NiNx@NC with an ultra-low loading of Ni (7.4 × 10-6 mol%). The Ni-N coordination, subnanometer particle size, and uniform distribution of NiNx on the NC support lead to excellent catalytic activity (TON = 2702) and selectivity for the amination of aldehydes to produce amides.

Visible light-driven molecular oxygen activation for oxidative amidation of alcohols using lead-free metal halide perovskite.

Herein, we report the modulation of the band structures of halide perovskite Cs2CuBr4 by tuning the synthesis methods. The photocatalyst PC-1, synthesized by the hot injection method, has a more negative conduction band minima (CBM) than the photocatalyst PC-2, synthesized at room temperature. As a result, PC-1 can activate molecular O2 more efficiently to initiate the radical-mediated dehydrogenation of alcohols. The more positive valence band maxima (VBM) of PC-1 also facilitates amine oxidation to the corresponding radical. Further, improved charge separation and transport and a decrement in the photogenerated charge carrier recombination have been detected for PC-1 to enhance photocatalytic activity. PC-1 showed improved yields for a series of structurally diverse amides (highest yield = 98%) by oxidative amidation of alcohols under visible light irradiation.

Learning Continuous 2D Diffusion Maps from Particle Trajectories without Data Binning.

Diffusion coefficients often vary across regions, such as cellular membranes, and quantifying their variation can provide valuable insight into local membrane properties such as composition and stiffness. Toward quantifying diffusion coefficient spatial maps and uncertainties from particle tracks, we use a Bayesian method and place Gaussian Process (GP) Priors on the maps. For the sake of computational efficiency, we leverage inducing point methods on GPs arising from the mathematical structure of the data giving rise to non-conjugate likelihood-prior pairs. We analyze both synthetic data, where ground truth is known, as well as data drawn from live-cell single-molecule imaging of membrane proteins. The resulting tool provides an unsupervised method to rigorously map diffusion coefficients continuously across membranes without data binning.

Deciphering charge transfer dynamics of a lead halide perovskite-nickel(ii) complex for visible light photoredox C-N coupling.

Photoredox catalysis involving perovskite quantum dots (QDs) has gained enormous attention because of their high efficiency and selectivity. In this study, we have demonstrated CsPbBr3 QDs as photocatalysts for the C-N bond formation reaction. The introduction of Ni(dmgH)2 (dmgH = dimethyl glyoximato) as a cocatalyst with CsPbBr3 QDs facilitates photocatalytic C-N coupling to form a wide variety of amides. The optimized interaction between the cocatalyst and photocatalyst enhances charge transfer and mitigates charge recombination, ultimately boosting photocatalytic performance. The photocatalytic activity is notably influenced by the variation in the amount of cocatalyst and 7 wt% Ni(dmgH)2 produces the best yield (92%) of amide. Femtosecond transient absorption spectroscopy reveals that the dynamics of the trap states of QDs are affected by cocatalyst. Further, Ni(dmgH)2 facilitates molecular oxygen activation to form superoxide radicals, which further initiates the radical pathway for the C-N coupling.

Radial artery harvest: a potential cause of arteriovenous access-associated hand ischemia.

Hand ischemia has multiple causes. In this article, we report an additional factor that can induce hand ischemia in hemodialysis patients. A 64-year-old white man with coronary artery disease underwent a coronary artery bypass graft procedure using the left radial artery as the bypass graft. Several months later, a left extremity Gracz fistula was created for arteriovenous access. Ever since dialysis was performed via the fistula the patient has experienced a cold hand and pain during dialysis that was somewhat relieved by wearing a woolen glove while on dialysis. Absence of the radial artery in the context of an ipsilateral arteriovenous access was highlighted as a possible etiology. A complete arteriography to determine the presence of stenoses, distal arteriopathy, and true steal was recommended, but the patient refused to undergo any investigation or procedure and instead decided to continue wearing the glove during the treatment. A plan for close follow-up and possible interventions in the event of worsening pain/ulceration was agreed upon. Radial artery harvest can result in hand ischemia if an ipsilateral arteriovenous access is created. We suggest that the contralateral extremity should be considered if an arteriovenous access is required to minimize this risk of this phenomenon.

Blood pressure recordings during hemodialysis access interventions: implications for acute management.

A retrospective study evaluating the pattern of blood pressure and its related complications before, during, and after percutaneous hemodialysis interventions was performed in patients presenting with asymptomatic hypertension. Hemodialysis patients undergoing percutaneous interventions including tunneled hemodialysis catheter insertion, percutaneous balloon angioplasty and thrombectomy procedure, and stage II hypertension (systolic blood pressure ≥160 mmHg) were included in this analysis. Blood pressure medications were not used while midazolam and fentanyl were routinely administered. Patients were followed for up to 4 weeks to monitor any complications. The mean blood pressure before, during, and after the procedures were 185 ± 18/96 ± 14, 172 ± 22/92 ± 15, and 153 ± 25/87 ± 14, respectively. There was a statistically significant difference between the blood pressure readings before and after the procedure (before = 185 ± 18/96 ± 14, after = 153 ± 25/87 ± 14; p = 0.001). None of the patients had a stroke, myocardial infarction, or acute pulmonary edema before, during, or after the procedure or during the 4-week follow-up period. A significant reduction in blood pressure was observed after the procedure without the administration of any antihypertensive medication. These results suggest that the reduction in blood pressure observed after percutaneous dialysis access interventions (particularly in the presence of midazolam and fentanyl) may make it unnecessary to treat asymptomatic hypertension prior to these procedures.

Transcatheter Aortic Valve Replacement Outcomes in End-Stage Renal Disease Patients on Hemodialysis Requiring Midodrine.

Background: Patients with dialysis-dependent end-stage renal disease (ESRD) taking midodrine may be at high risk for poor outcomes following transcatheter aortic valve replacement (TAVR). We evaluated dialysis-dependent ESRD patients taking midodrine. Methods: We conducted a retrospective analysis of non-clinical trial TAVR patients from February 2012 to December 2020 from 11 facilities in a Western US health system. Patient groups included ESRD patients on midodrine before TAVR (ESRD [+M]), ESRD patients without midodrine (ESRD [-M]), and non-ESRD patients. The endpoints of 30-day and 1-year mortality were represented by Kaplan-Meier survival estimator and compared by log-rank test. Results: Forty-five ESRD (+M), 216 ESRD (-M), and 6898 non-ESRD patients were included. ESRD patients had more comorbid conditions, despite no significant difference in predicted Society of Thoracic Surgeons mortality risk between ESRD (+M) and ESRD (-M) (8.7% vs. 9.2%, p = 0.491). Thirty-day mortality was significantly higher for ESRD (+M) patients vs. ESRD (-M) patients (20.1% vs. 5.6%, p = 0.001) and for ESRD (+M) vs. non-ESRD patients (2.5%, p < 0.001). One-year mortality trended higher for ESRD (+M) vs. ESRD (-M) patients (41.9% vs. 29.8%, p = 0.07), and was significantly higher for ESRD (+M) vs. non-ESRD patients (10.7%, p < 0.001). Compared to ESRD (-M), ESRD (+M) patients had a higher incidence of 30-day stroke (6.7% vs. 1.4%, p = 0.033), 30-day vascular complications (6.7% vs. 0.9%, p = 0.011), and a lower rate of discharge to home (62.2% vs. 84.7%, p < 0.001). In contrast, ESRD (-M) patients had no significant differences from non-ESRD patients for these outcomes. Conclusions: Our experience suggests ESRD patients on midodrine are a higher acuity population with worse survival after TAVR, compared to ESRD patients not on midodrine. These findings may help with risk stratification for ESRD patients undergoing TAVR.

Cirrhotic cardiomyopathy influences clinical outcomes and enhances performance of conventional risk prediction models in acute-on-chronic liver failure with severe sepsis.

BACKGROUND: Point-of-care echocardiography (POC-Echo) is an essential intensive care hemodynamic monitoring tool. AIMS: To assess POC-Echo parameters [i.e., cardiac index (CI), systemic vascular resistance index (SVRI) and cirrhotic cardiomyopathy (CCM) markers] and serum biomarkers in predicting circulatory failure (need for vasopressors) and mortality in patients with acute-on-chronic liver failure (ACLF) having sepsis-induced hypotension. METHODS: We performed serial POC-Echo within 6 hours (h) of presentation and subsequently at 24, 48 and 72 h in patients with ACLF and sepsis-induced hypotension admitted to our liver intensive care unit. Clinical data, POC-Echo data and serum biomarkers were collected prospectively. RESULTS: We enrolled 120 patients [59% men, aged 49 ± 12 years, 56% alcohol-related disease and median MELDNa of 30 (27-32)], of whom 68 (56.6%) had circulatory failure, with overall mortality of 60%. CCM was present in 52.5%. The predictors of circulatory failure were CI (aHR -1.5; p = 0.021), N-terminal brain natriuretic peptide (aHR -1.1; p = 0.007) and CCM markers; e' septal mitral velocity (aHR -0.5; p = 0.039) and E/e' ratio (aHR -1.2; p = 0.045). Reduction in CI by 20% and SVRI by 15% at 72 h predicted mortality with a sensitivity of 84% and 72%, and specificity 76% and 65%, respectively (p < 0.001). The MELD-CCM model and CLIF-CCM model were computed as MELDNa + 1.815 × E/e' (septal) + 0.402 × e' (septal) and CLIF-C ACLF + 1.815 × E/e' (septal) + 0.402 × e' (septal), respectively, based on multivariable logistic regression. Both scores outperformed MELDNa (z-score = -2.073, p = 0.038) and CLIF-C ACLF score (z score = -2.683, p-value = 0.007), respectively, in predicting 90-day mortality. CONCLUSION: POC-Echo measurements such as CCM markers (E/e' and e' velocity) and change in CI reliably predict circulatory failure and mortality in ACLF with severe sepsis. CCM markers significantly enhanced the CLIF-C ACLF and MELDNa predictive performance.