Early Clinical Outcomes of Patients With Stress-Induced Cardiomyopathy Receiving Acute Mechanical Support in the US.

Background: The role of acute mechanical circulatory support (aMCS) in patients with stress-induced cardiomyopathy (SIC) complicated by cardiogenic shock (CS) is not well studied. Here, we describe the incidence and outcomes of aMCS use in SIC-CS using a large national database. Methods: Using the Nationwide Readmissions Database from January 2016 to November 2019, we identified patients hospitalized with SIC who received isolated intra-aortic balloon pump (IABP), microaxial flow pump (Impella, Abiomed), or extracorporeal membrane oxygenation (ECMO) during the index hospitalization. Results: A total of 902 among 94,709 hospitalizations for SIC (1.0%) required aMCS during the index hospitalization: 611 had IABP (67.7%), 189 had Impella (21.0%) and 102 had ECMO (11.3%). Patients with ECMO or Impella had higher in-hospital mortality rates than those with IABP (37.3% vs 29.1% vs 18.5%, respectively). There was an increased adjusted risk of in-hospital death with Impella (adjusted odds ratio [aOR], 1.98; 95% CI, 1.12-3.49) and ECMO (aOR, 4.15; 95% CI, 1.85-9.32) vs IABP. Impella was associated with an increased adjusted risk of 30-day readmission compared to IABP (aOR, 2.53; 95% CI, 1.16-5.51). Patients with ECMO or Impella had a higher incidence of renal replacement therapy and vascular/bleeding complications compared to those who received IABP. Conclusions: In this nationwide analysis using an administrative database, patients who received ECMO and Impella showed higher rates of in-hospital mortality, renal replacement therapy, and vascular/bleeding complications compared to those who received IABP. Patients with more comorbidities may receive more aggressive hemodynamic support which may account for observed mortality differences. Future prospective studies with objective and universal characterization of baseline clinical and hemodynamic characteristics of patients with CS secondary to SIC are needed.

Right Atrial Pressure Is Associated With Outcomes in Patient With Cardiogenic Shock Receiving Acute Mechanical Circulatory Support.

Background: We describe the association between longitudinal hemodynamic changes and clinical outcomes in patients with cardiogenic shock (CS) receiving acute mechanical circulatory support devices (AMCS) at a single center. We hypothesized that improved right atrial pressure is associated with better survival in CS. Methods: Retrospective analysis of patients from Tufts Medical Center that received AMCS for CS. Baseline characteristics and invasive hemodynamics were collected, analyzed, and correlated against outcomes. Hemodynamics were recorded at different time intervals during index admission [pre-AMCS, 24 h after AMCS (post AMCS), and last available set of hemodynamics (final-AMCS)]. Logistic regression was performed to determine variables associated with in-hospital mortality. Results: A total of 76 patients had longitudinal hemodynamics available. In hospital mortality occurred in 46% of the cohort. Mean baseline right atrial pressure (RAP) was significantly higher among non-survivors vs. survivors (19.5+6.6 vs. 16.4+5.3 mmHg). Change in right atrial pressure from baseline to before device removal (ΔRA:final AMCS-pre AMCS) was significantly different between survivors and non survivors (-6.5 ± 6.9 mmHg vs. -2.5 ± 6.2 mmHg p = 0.03). Unadjusted logistic regression revealed baseline RAP (OR: 1.1 95% CI: 1.0-1.2), 24 h post device implant RAP (OR: 1.3 95% CI: 1.1-1.4), and final RAP (OR: 1.3 95% CI: 1.1-1.5) to be significant predictors of in-hospital mortality. In a multivariate logistic regression baseline RAP was no longer significantly associated with mortality in the overall cohort, while 24 h (OR: 1.26 95% CI: 1.1-1.5) and final RAP (OR: 1.3 95% CI: 1.1-1.6) remained statistically significant. Conclusion: We report a novel retrospective analysis of hemodynamic changes in patients with CS receiving AMCS. Our findings identify the potential importance of venous congestion as a prognostic marker of mortality. Furthermore, early decongestion or reduced RA pressure is associated with better survival in these critically ill CS patients. These observations suggest the need for further study in larger retrospective and prospective cohorts of patients with varying degrees of CS severity.

Single stick access using a VA-ECMO arterial return cannula for coronary intervention in cardiogenic shock.

Use of veno-arterial extracorporeal membrane oxygenation (VA-ECMO) is growing exponentially for cardiogenic shock and cardiac arrest, and many of these patients require percutaneous coronary intervention (PCI). In some cases, radial arterial access may not feasible among patients with peripheral vascular disease or if larger diameter guide catheters are required. Further, VA-ECMO is commonly used in combination with an intra-aortic balloon pump or Impella, thereby limiting vascular access options and increasing the risk of vascular complications including bleeding and limb ischemia. For these reasons, new approaches to perform PCI without the need for an additional arterial puncture are required. We describe a case of a 70-year-old man with cardiogenic shock referred for high-risk PCI while supported with VA-ECMO and an Impella CP and illustrate a novel method for single-stick access for PCI through the return cannula of the VA-ECMO circuit.

Invasive Hemodynamic Assessment and Classification of In-Hospital Mortality Risk Among Patients With Cardiogenic Shock.

BACKGROUND: Risk stratifying patients with cardiogenic shock (CS) is a major unmet need. The recently proposed Society for Cardiovascular Angiography and Interventions (SCAI) stages as an approach to identify patients at risk for in-hospital mortality remains under investigation. We studied the utility of the SCAI stages and further explored the impact of hemodynamic congestion on clinical outcomes. METHODS: The CS Working Group registry includes patients with CS from 8 medical centers enrolled between 2016 and 2019. Patients were classified by the maximum SCAI stage (B-E) reached during their hospital stay according to drug and device utilization. In-hospital mortality was evaluated for association with SCAI stages and hemodynamic congestion. RESULTS: Of the 1414 patients with CS, the majority were due to decompensated heart failure (50%) or myocardial infarction (MI; 35%). In-hospital mortality was 31% for the total cohort, but higher among patients with MI (41% versus 26%, MI versus heart failure, P<0.0001). Risk for in-hospital mortality was associated with increasing SCAI stage (odds ratio [95% CI], 3.25 [2.63-4.02]) in both MI and heart failure cohorts. Hemodynamic data was available in 1116 (79%) patients. Elevated biventricular filling pressures were common among patients with CS, and right atrial pressure was associated with increased mortality and higher SCAI Stage. CONCLUSIONS: Our findings support an association between the proposed SCAI staging system and in-hospital mortality among patient with heart failure and MI. We further identify that venous congestion is common and identifies patients with CS at high risk for in-hospital mortality. These findings provide may inform future management protocols and clinical studies.

Transaxillary Intra-Aortic Balloon Pump Deployment Through a Novel Braided Sheath for Advanced Heart Failure Patients Requiring an Extended Duration of Temporary Circulatory Support.

For decompensated advanced heart failure patients, the intra-aortic balloon pump (IABP) is a commonly used mechanical circulatory support (MCS) device used to support pharmacotherapy-refractory myopaths. In the United States, the heart allocation policy was revised in 2018, placing patients who may receive a clinically indicated temporary MCS device, like an IABP, at elevated medical urgency on the transplantation waiting list. Percutaneous transaxillary IABP delivery for the decompensated advanced heart failure patient is a safe, tolerable and efficacious alternative to traditional transfemoral deployment, and allows for ambulation and meaningful physical therapy engagement in the patient who may require an extended duration of support awaiting advanced therapies. We present two cases of percutaneous transaxillary IABP delivery via the Super Arrow-Flex braided sheath (Teleflex, Morrisville, NC) in advanced heart failure patients. The Super Arrow-Flex Sheath is a braided, durable, non-kinking conduit that can negotiate tortuous vascularity while maintaining its internal integrity; transaxillary IABP delivery through this sheath offers the patient a wide latitude of ipsilateral upper extremity movement and ambulation with minimal risk of damage to the IABP catheter. The Super Arrow-Flex sheath may improve transaxillary IABP security, durability and longevity in the advanced heart failure population for whom long-term IABP is anticipated.

Clinical correlates of hand-held ultrasound-guided assessments of the inferior vena cava in patients with acute decompensated heart failure.

BACKGROUND: Accurately assessing volume status in acutely decompensated heart failure (ADHF) can be challenging. Inferior vena cava (IVC) dynamics by echocardiography allow indirect assessment of volume status in these patients. Recently introduced hand-held ultrasound devices are promising. We aimed to describe the clinical correlates of volume status assessment using a hand-held ultrasound device in ADHF. METHODS: In this prospective study, we evaluated 106 patients admitted with ADHF. First scan was performed within 24 hours of admission and timed in reference to first dose of intravenous diuretic. Daily resting and inspiratory (sniff) IVC diameters were measured according to standard echocardiography methods during hospitalization including the day of discharge. IVC collapsibility index (IVC-CI = Maximum IVC diameter-Inspiratory IVC diameter/maximum diameter; <0.5 representing hypervolemia) was calculated. Primary study endpoint was 30-day readmission. Research activities were independent of clinical decision-making. RESULTS: Data for 106 patients was analyzed. Mean age was 66.7 ± 13.8 years, of which 53.8% were females, and a mean ejection fraction was 39 ± 18%. Initial scan of the IVC was obtained at an average time of 5.2 ± 8.04 hours from first diuretic dose. 81.2% of patients at admission had an IVC-CI <0.5. 63.2% patients had an IVC-CI <0.5 at discharge. There were no significant differences in age, length of stay, diuretic dose, or 30-day readmissions between patients with a discharge IVC-CI <0.5 vs ≥ 0.5. CONCLUSION: Hand-held ultrasound assessment of IVC-CI in ADHF patients, although a feasible concept, is unable to predict 30-day readmissions in our study. Further prospective studies are necessary.

Prevalence and Clinical Correlates of Extended Mechanical Support in Patients Undergoing High-Risk Percutaneous Coronary Intervention in Current Clinical Practice: Insights from the cVAD Registry.

BACKGROUND: High-risk percutaneous coronary interventions (HR-PCI) are prone to hemodynamic instability, resulting in poor outcomes. Acute mechanical circulatory support (AMCS) devices are used during HR-PCI to improve outcomes. However, the clinical criteria for extended AMCS have not been well characterized. The aim of this study was to describe the prevalence and clinical correlates of extended AMCS in patients undergoing elective or urgent HR-PCI. METHODS: We retrospectively analyzed 507 patients enrolled in the catheter-based ventricular assist device (cVAD) registry who underwent elective or urgent HR-PCI with prophylactic use of Impella. The study population was divided into two groups: Impella support removed immediately after PCI (Group A, n = 464) and extended support after PCI (Group B, n = 43). Multivariable regression analysis was used to identify independent predictors of extended AMCS. RESULTS: Baseline characteristics were similar between the groups. Non-ST-elevation myocardial infarction in 26.3% in Group A vs 41.8% in Group B (p = 0.03). PCI of left main was common in Group A (p = 0.02), whereas the right coronary artery was common in Group B (p < 0.001). The mean duration of Impella support 1.1 ±â€¯0.6 h in Group A vs 11.4 ±â€¯16.8 h in Group B (p < 0.001). Death and vascular complications were higher with extended Impella support. Revascularization of chronic total occlusion (CTO) was an independent predictor of extended Impella support (OR 3.2, 95% CI 1.20-8.53). CONCLUSIONS: About 9% of patients enrolled in the cVAD registry undergoing elective or urgent HR-PCI received extended Impella support. In-hospital mortality was about 12% in patients requiring extended Impella support. CTO was associated with a higher likelihood of extended AMCS. The hemodynamic benefits of extended AMCS support must be weighed in terms of risk of complications.

Percutaneous Management of Outflow Graft Obstruction in Patients With Continuous Flow Left Ventricular Assist Devices.

Outflow graft obstruction (OGO) has been reported as a cause of left ventricular assist device dysfunction. The incidence, diagnosis, and treatment of OGO remains poorly understood. We present our experience with the diagnosis and management of OGO in the cardiac catheterization laboratory. (Level of Difficulty: Advanced.).

Revascularization in Cardiogenic Shock and Advanced Heart Failure.

PURPOSE OF REVIEW: Ischemic heart disease is the most common cause of heart failure with systolic dysfunction. The progressive course of heart failure characterized by increasing levels of care and worsening quality of life often indicates an advanced stage. Similarly, cardiogenic shock remains a major clinical problem with prohibitively high mortality rates despite major advances in clinical care. Here, we review the current treatment options and available data for revascularization in patients with ischemic cardiomyopathy, advanced heart failure, and cardiogenic shock. We also explore the emerging role of Interventional Heart Failure specialist within the Heart Team. RECENT FINDINGS: Although guideline-directed medical therapy remains the cornerstone treatment strategy for patients with advanced heart failure, coronary revascularization is sometimes indicated. There is a relatively paucity of evidence regarding different revascularization strategies and the use of acute mechanical circulatory support in patients with advanced heart failure and in those presenting with cardiogenic shock. A deep understating of the physiologic and hemodynamic effects of different acute mechanical support platforms is of paramount importance in preparation for revascularization in these patients. The decision regarding revascularization in patients with coronary artery disease in the setting of left ventricular dysfunction remains challenging. Clinical decision-making in these cases requires interdisciplinary discussion and assessment of the potential long-term survival derived from surgical revascularization against its higher perioperative risk.

Hypervolemic Hyponatremia in Heart Failure.

Heart failure (HF) represents the most common cause of hypervolemic hyponatremia in current clinical practice. The presence of hyponatremia has been independently associated with worse outcomes in this patient population. The pathogenesis of hyponatremia in HF involves complex neurohormonal and cardio-renal interactions, including an increase in non osmotic secretion of arginine vasopressin (AVP) and insufficient tubular flow in the diluting segments of the nephron. The treatment of hyponatremia in HF involves decongestant therapy with diuretics, neurohormonal blockade and in certain occasions the use of AVP antagonists. The aim of this chapter is to summarize the pathophysiology, current evidence, and management recommendations for hyponatremia in patients with HF, with a specific focus on AVP homeostasis.

Causes and Predictors of 30-Day Readmission in Patients With Acute Myocardial Infarction and Cardiogenic Shock.

BACKGROUND: Acute myocardial infarction (AMI) occurs as a result of irreversible damage to cardiac myocytes secondary to lack of blood supply. Cardiogenic shock complicating AMI has significant associated morbidity and mortality, and data on postdischarge outcomes are limited. METHODS AND RESULTS: We derived the study cohort of patients with AMI and cardiogenic shock from the 2013 to 2014 Healthcare Cost and Utilization Project National Readmission Database. Incidence, predictors, and causes of 30-day readmissions were analyzed. From 43 212 index admissions for AMI with cardiogenic shock, 26 016 (60.2%) survived to discharge and 5277 (20.2% of survivors) patients were readmitted within 30 days. More than 50% of these readmissions occurred within first 10 days. Cardiac causes accounted for 42% of 30-day readmissions (heart failure 20.6%; acute coronary syndrome 11.6%). Among noncardiac causes, respiratory (11.4%), infectious (9.4%), medical or surgical care complications (6.3%), gastrointestinal/hepatobiliary (6.5%), and renal causes (4.8%) were most common. Length of stay ≥8 days (odds ratio [OR], 2.04; 95% confidence interval [CI], 1.70-2.44; P<0.01), acute deep venous thrombosis (OR, 1.26; 95% CI, 1.08-1.48; P<0.01), liver disease (OR, 1.25; 95% CI, 1.03-1.50; P=0.02), systemic thromboembolism (OR, 1.21; 95% CI, 1.02-1.44; P=0.02), peripheral vascular disease (OR, 1.16; 95% CI, 1.07-1.27; P<0.01), diabetes mellitus (OR, 1.16; 95% CI, 1.08-1.24; P<0.01), long-term ventricular assist device implantation (OR, 1.77; 95% CI, 1.23-2.55; P<0.01), intraaortic balloon pump use (OR, 1.10; 95% CI, 1.02-1.18; P<0.01), performance of coronary artery bypass grafting (OR, 0.85; 95% CI, 0.77-0.93; P<0.01), private insurance (OR, 0.72; 95% CI, 0.64-0.80; P<0.01), and discharge to home (OR, 0.85; 95% CI, 0.73-0.98; P=0.03) were among the independent predictors of 30-day readmission. CONCLUSIONS: In-hospital mortality and 30-day readmission in cardiogenic shock complicating AMI are significantly elevated. Patients are readmitted mainly for noncardiac causes. Identification of high-risk factors may guide interventions to improve outcomes within this population.

Trials and Tribulations of Assessing New Imaging Protocols: Combining Vasodilator Stress With Exercise.

Among all patients referred for stress myocardial perfusion imaging (MPI), a substantial proportion in contemporary practice cannot exercise. Another group of patients are those who are thought to be able to achieve an adequate workload with treadmill (or bicycle) exercise but do not achieve at least 85% of maximum predicted heart rate without developing symptoms. There has been substantial interest and literature on the adjunctive use of vasodilator stress during the same visit to generate best-quality results for patients who do not exercise adequately. Current American Society of Nuclear Cardiology Guidelines recommend the possible use of vasodilator stress agents to supplement exercise in those patients who do not achieve target heart rate. However, optimal timing of administration is not clear. Herein, we summarize literature to date on the combination of vasodilator and exercise stress testing in light of the recently published Exercise to Regadenoson in Recovery Trial (EXERRT).

Psychiatric conditions as predictors of rehospitalization among African American patients hospitalized with heart failure.

INTRODUCTION: African Americans (AAs) have the highest risk of developing heart failure (HF) among all ethnicities in the United States and are associated with higher rates of readmissions and mortality. This study aims to determine the prevalence and relationship of common psychiatric conditions to outcomes of patients hospitalized with HF. HYPOTHESIS: Psychiatric conditions lead to worse outcomes in HF patients. METHODS: This single-center retrospective study enrolled 611 AA patients admitted to an urban teaching community hospital for HF from 2010 to 2013. Patient demographics, clinical variables, and history of psychiatric disorders were obtained. Cox proportional hazards regression was used to assess impact of psychiatric disorders on readmission rates and mortality. RESULTS: The mean age was 66 ± 15 years; 53% were men. Median follow-up time from index admission for HF was 3.2 years. Ninety-seven patients had a psychiatric condition: 46 had depression, 11 had bipolar mood disorder (BMD), and 40 had schizophrenia. After adjustment of known risk factors and clinical metrics, our study showed that AA HF patients with a psychiatric illness were 3.84× more likely to be admitted within 30 days for HF, compared with those without (P < 0.001). Individually, adjusted Cox multivariable logistic regression analysis also showed that, for 30-day readmission, schizophrenia had a hazard ratio (HR) of 4.92 (P < 0.001); BMD, an HR of 3.44 (P = 0.02); and depression, an HR 3.15 (P = 0.001). No associations were found with mortality. CONCLUSIONS: Psychiatric conditions of schizophrenia, BMD, and depression were significantly associated with a higher 30-day and overall readmission rate for HF among AA patients.

Integrating Interventional Cardiology and Heart Failure Management for Cardiogenic Shock.

Cardiogenic shock remains one of the most common causes of in-hospital death. Recent data have identified an overall increase in patient complexity, with cardiogenic shock in the setting of acute myocardial infarction. The use of percutaneous acute mechanical circulatory support (AMCS) has steadily grown in the past decade. Guidelines and consensus statements addressing proper patient selection, timing of AMCS implantation, device choice, and postimplantation protocol are appearing. The emerging role of interventional heart failure specialists within the heart team includes integration and understanding of advanced hemodynamic and cathether-based therapies, with the goal of improving outcomes.

The Role of Medical Therapy in Moderate to Severe Degenerative Mitral Regurgitation.

Mitral regurgitation (MR) is a common valvular disorder that has important health and economic consequences. Standardized guidelines exist regarding when and in whom to perform mitral valve surgery, but little information is available regarding medical treatment of MR. Many patients with moderate or severe MR do not meet criteria for surgery or are deemed to be at high risk for surgical therapy. We reviewed the available published data on medical therapy in the treatment of patients with primary MR. b-blockers and renin-angiotensin-aldosterone system inhibitors had the strongest supporting evidence for providing beneficial effects. b-blockers appear to lessen MR, prevent deterioration of left ventricular function, and improve survival in asymptomatic patients with moderate to severe primary MR. Angiotensin-converting enzyme inhibitor and angiotensin receptor blocker therapy reduces MR, especially in asymptomatic patients. However, in the setting of hypertrophic cardiomyopathy or mitral valve prolapse, vasodilators can increase the severity of MR. To define the precise role of medical therapy, a larger randomized controlled trial is needed to confirm benefit and assess in which subsets of patients medical therapy is most useful. Medical therapy in some patients improves symptoms, lessens MR, and may delay the need for surgical intervention.

Marital status and living condition as predictors of mortality and readmissions among African Americans with heart failure.

UNLABELLED: Socioeconomic factors, including social support, may partially explain why African Americans (AA) have the highest prevalence of heart failure and with worse outcomes compared to other races. AA are more likely to be hospitalized and readmitted for heart failure and have higher mortality. The purpose of this study is to determine whether the social factors of marital status and living condition affect readmission rates and all-cause mortality following hospitalization for acute decompensated heart failure (ADHF) in AA patients. METHODS: Medical records from 611 AA admitted to Einstein Medical Center Philadelphia from January, 2011 to February, 2013 for ADHF were reviewed. Patient demographics including living condition (nursing home residents, living with family or living alone) and marital status (married or non-married -including single, divorced, separated and widowed) were correlated with all-cause mortality and readmission rates. RESULTS: In this cohort (53% male, mean age 65±15, mean ejection fraction 32±16%) 25% (n=152) of subjects were unmarried. Unmarried patients had significantly higher 30-day readmission rates (16% vs. 6% p=0.0002) and higher 1-year mortality (17% vs. 11% p=0.047) compared with married patients. Fifty percent (n=303) of subjects were living with family members, while 40% (n=242) and 11% (n=66) were living alone or in a nursing facility, respectively. Patients living with family members had significantly lower 30-day readmission rates when compared with those living alone or in a nursing facility (7% vs 21% vs. 18% p=<0.0001). Furthermore, they had the lowest 1-year mortality (14% vs 32% for nursing facility patients and 17% for those living alone (p=0.0007). After controlling for traditional risk factors (age, gender, body mass index, peak troponin I, left ventricular ejection fraction, B-type natriuretic peptide, hypertension, diabetes mellitus, hyperlipidemia, and coronary artery disease), being married was an indpendent predictor of 1-year mortality (OR 0.50 p=0.019) and living alone for 30-day readmission (OR 2.86 p=<0.001). CONCLUSION: The socioeconomic factors of marital status and living condition significantly correlated with mortality and 30-day readmission rate in AA heart failure patients. Specifically, being married and living with family independently predict lower mortality and fewer readmissions. Surprisingly, living in a nursing facility was associated with significantly higher mortality than living alone or with family.

Methods for Evaluating Right Ventricular Function and Ventricular-Arterial Coupling.

Right ventricular function (RVF) carries great prognostic significance in heart failure and pulmonary hypertension (PH). Although there is considerable focus on RVF in pulmonary arterial hypertension, RVF is also of great importance in group 2 PH. This article will discuss assessment of RVF and evaluation of the Right Ventricle-Pulmonary Artery (RV-PA) coupling relationship. Cardiac imaging modalities allow direct visualization and assessment of RVF. Imaging modalities include the commonly utilized echo-Doppler imaging evaluating RV fractional area change, tricuspid annular plane systolic excursion and Tissue Doppler Imaging, in addition to the increasingly utilized cardiac magnetic resonance. Invasive hemodynamic assessment also plays an important role and can also be employed during exercise to help elucidate functional reserve. Cardiopulmonary exercise testing provides added insight into the mechanisms of cardiopulmonary disease. Cardiac imaging, invasive hemodynamics, and gas exchange stress testing can be combined to give a more sophisticated understanding of RVF. The RV-PA coupling relationship can be assessed using practical and clinically available metrics in order to gain clinically relevant understanding of the patients' physiologic state. RV-PA coupling assessments can be done using invasive, combined noninvasive-invasive, or non-invasive approaches. We also discuss our approaches in the assessment of the RV-PA coupling relationship.