Update on cardiogenic shock: from detection to team management.

PURPOSE OF REVIEW: The following review is intended to provide a summary of contemporary cardiogenic shock (CS) profiling and diagnostic strategies, including biomarker and hemodynamic-based (invasive and noninvasive) monitoring, discuss clinical differences in presentation and trajectory between acute myocardial infarction (AMI)-CS and heart failure (HF)-CS, describe transitions to native heart recovery and heart replacement therapies with a focus on tailored management and emerging real-world data, and emphasize trends in team-based initiatives and interventions for cardiogenic shock including the integration of protocol-driven care. RECENT FINDINGS: This document provides a broad overview of contemporary scientific consensus statements as well as data derived from randomized controlled clinical trials and observational registry working groups focused on cardiogenic shock management. SUMMARY: This review highlights the increasingly important role of pulmonary artery catheterization in AMI-CS and HF-CS cardiogenic shock and advocates for routine application of algorithmic approaches with interdisciplinary care pathways. Cardiogenic shock algorithms facilitate the integration of clinical, hemodynamic, and imaging data to determine the most appropriate patient hemodynamic support platform to achieve adequate organ perfusion and decongestion.

Global hypokinesis in resting transthoracic echocardiography diagnosis of heart failure and coronary artery disease.

Objectives: Although coronary artery disease (CAD) and heart failure (HF) are separate entities, HF is a common complication of CAD, and both CAD and HF are known causes of wall motion abnormalities (WMA) of transthoracic echocardiography (TTE). Specifically, global hypokinesis on TTE could logically be due to multivessel CAD or non-ischemic cardiomyopathy. The purpose of this study was to investigate the relationship between CAD, HF, and WMA on TTE. Methods: A single-center retrospective chart review was conducted of adults who had a resting TTE and cardiac catheterization within 30 days. We analysed the association between global hypokinesis, triple-vessel CAD, and HF diagnosis. Results: Across 754 included patients, there was a positive association between global hypokinesis on TTE and HF diagnosis (P < .001). There was no association between global hypokinesis on TTE and triple-vessel CAD (P = .341), possibly an inverse correlation. The sensitivity of regional (R) WMAs on TTE for diagnosing CAD was generally lower in patients without heart failure (44%), while specificity was higher in these same patients (89%). Conclusions: There was a positive association between global hypokinesis and HF, and a possible inverse correlation between global hypokinesis and triple-vessel CAD. This could be explained by heart failure diagnosis and other diagnoses having a stronger effect on global hypokinesis than any potential effect from triple-vessel CAD. These sensitivity and specificity results for RWMA on CAD, stratified by HF diagnosis and/or global hypokinesis, can be used to inform clinical decision-making in an acute coronary syndrome case with borderline electrocardiography and/or troponin findings.

Echocardiographic Evaluation of Diastolic Function in Special Populations.

Left ventricular (LV) diastolic dysfunction results from a combination of impaired relaxation, reduced restoring forces, and increased chamber stiffness. Noninvasive assessment of diastology uses a multiparametric approach involving surrogate markers of increased filling pressures, which include mitral inflow, septal and lateral annular velocities, tricuspid regurgitation velocity, and left atrial volume index. However, these parameters must be used cautiously. This is because the traditional algorithms for evaluating diastolic function and estimation of LV filling pressures (LVFPs), as recommended by the American Society of Echocardiography and European Association of Cardiovascular Imaging 2016 guidelines, do not apply to unique patients with underlying cardiomyopathies, significant valvular disease, conduction abnormalities, arrhythmias, LV assist devices, and heart transplants, which alter the relation between the conventional indexes of diastolic function and LVFP. The purpose of this review is to provide solutions for evaluating LVFP through illustrative examples of these special populations, incorporating supplemental Doppler indexes, such as isovolumic relaxation time, mitral deceleration time, and pulmonary venous flow analysis, as needed to formulate a more comprehensive approach.

Association Between Atrial Uptake on Cardiac Scintigraphy With Technetium-99m-Pyrophosphate Labeled Bone-Seeking Tracers and Atrial Fibrillation.

BACKGROUND: Transthyretin cardiac amyloidosis (ATTR-CA) is an increasingly recognized disease, in which atrial fibrillation (AF) has been shown to be prevalent. Cardiac scintigraphy with technetium-99m-pyrophosphate (99mTc-PyP) labeled bone-seeking tracers is used to noninvasively make the diagnosis of ATTR-CA, based on ventricular myocardial uptake. Assessment of atrial wall uptake (AU) on 99mTc-PyP is currently not used in the clinical setting Methods: We analyzed a cohort of patients referred for 99mTc-PyP scan at a tertiary center to explore AU and associations between any and incident AF, ATTR-CA, and all-cause mortality. RESULTS: Among 580 patients included, 296 patients (51%) had a diagnosis of AF; 164 patients (28%) had scans consistent with ATTR-CA while 117 patients (20%) had AU. Of 117 patients with AU, 107 (91%) had any AF. In contrast, of 463 patients without AU 191(41%) had any AF. Of those with AU, 59/117(50%) patients had a 99mTc-PyP diagnosis of ATTR-CA while 58/117(50%) patients did not have such a diagnosis (P=1.00). Patients with AU had significantly more any AF (hazard ratio [HR], 1.03 [95% CI, 1.02-1.04]; P<0.001), independent of ATTR-CA diagnosis and sex. On multivariable Cox proportional hazards analyses adjusting for age, AU, ATTR-CA diagnosis, sex, smoking, hypertension, diabetes, left ventricular ejection fraction, and coronary artery disease, both age (HR, 1.03 [95% CI, 1.02-1.04]; P<0.0001) and AU (HR, 2.68 [95% CI, 2.11-3.41]; P<0.0001) were independently associated with the development of any AF. Freedom from incident AF at 1-year was significantly lower in patients with AU, both in patients with and without ATTR-CA respectively (HR, 2.27 [95% CI, 1.37-3.78]; P<0.0001 versus HR, 2.21 [95% CI, 1.46-3.34]; P<0.0001). CONCLUSIONS: In a consecutive cohort of patients undergoing 99mTc-PyP scans, 20% had AU, which was statistically associated with any AF, independently of ATTR-CA diagnosis and sex. AU was associated with significantly lower freedom from incident AF at 1-year. Overlooking AU on 99mTc-PyP scans could potentially miss an earlier disease manifestation, or an additional risk factor for any/incident AF.