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Background: Transthoracic echocardiography (TTE) plays a key role in the initial work‐up of myocarditis where the identification of pathologic structural and functional changes may assist in its diagnosis and management. The aim of this systematic review was to appraise the evidence for the utility of echocardiographic parameters of cardiac structure and function in the diagnosis of myocarditis in adult populations. Methods: A systematic literature search of medical databases was performed using PRISMA principles to identify all relevant studies assessing TTE parameters in adult patients with myocarditis (1995–2020; English only; PROSPERO registration CRD42021243598). Data for a range of structural and functional TTE parameters were individually extracted and those with low heterogeneity were then meta‐analyzed using a random‐effects model for effect size, and assessed through standardized mean difference (SMD). Results: Available data from six studies (with a pooled total of 269 myocarditis patients and 240 controls) revealed that myocarditis can be reliably differentiated from healthy controls using echocardiographic measures of left ventricular (LV) size and systolic function, in particular LV end‐diastolic diameter, LV ejection fraction (LVEF) and LV global longitudinal strain (LV‐GLS) (p ≤.01 for all). LV‐GLS demonstrated the highest overall effect size, followed by LVEF and LVEDD (SMD: |0.46–1.98|). Two studies also demonstrated that impairment in LV‐GLS was associated with adverse cardiovascular outcomes in this population, irrespective of LVEF. Conclusions: LV‐GLS demonstrated the greatest overall effect size and therefore ability to differentiate myocarditis populations from healthy controls. GLS was also shown to be a predictor of adverse cardiovascular outcomes, in this population. Hightlights: What is already known on this subject? Myocarditis is a disease process that is often a diagnosis of exclusion, as it frequently mimics other acute cardiac pathologies.Transthoracic echocardiography is traditionally the initial imaging modality used for noninvasive structural assessment in populations with myocarditis. What might this study add? This study demonstrates that left ventricular (LV) global longitudinal strain, LV ejection fraction and LV end‐diastolic diameter can differentiate between myocarditis patients and healthy controls.LV‐GLS demonstrated the greatest overall effect size when comparing these two populations, in comparison to the other measures. How might this impact on clinical practice? This study demonstrates that assessment of myocardial deformation indices allows for sensitive discrimination between myocarditis patients from healthy controls.Routine assessment of LV‐GLS may serve as an important diagnostic tool in the acute care setting. [ABSTRACT FROM AUTHOR]

Background: Atrial fibrillation (AF) is a prevalent disease with associated mortality risk, mediated in large part through its associated cardiovascular risk factors. Standard modifiable cardiovascular risk factors (SMuRFs; hypercholesterolaemia, hypertension, diabetes and smoking) are established drivers of cardiovascular disease; however, the importance of non‐traditional mediators of cardiovascular risk (NTRFs) such as chronic renal impairment, obstructive sleep apnoea and obesity is emerging. The differential impact of these risk factors on outcomes in patients with AF is not well studied. Methods: Consecutive patients admitted to our service between January 2013 and January 2018 with a primary diagnosis of non‐valvular AF were assessed. Assessment of demographic, anthropometric, risk factor profile and pharmacotherapeutics was performed. The clinical course of these patients was followed for up to five years for the composite outcome of all‐cause death and major adverse cardiovascular events. Results: Of the 1010 patients (62.29 ± 16.81 years, 51% men) included, 154 (15%) had no risk factors, 478 (47%) had only SMuRFs, 59 (6%) had only NTRFs and 319 (32%) had both SMuRFs and NTRFs. Over a mean follow‐up period of 33.18 ± 21.27 months, a total of 288 patients met the composite outcome. On Cox regression, the coexistence of SMuRFs and NTRFs was an independent predictor of the composite outcome (HR 1.40; 95%CI 1.09–1.82, p =.01). Other independent predictors included age, heart failure, CHA2DS2VASc score, persistent AF and anaemia. Conclusions: The presence of both SMuRFs and NTRFs has prognostic implications in patients with non‐valvular AF. [ABSTRACT FROM AUTHOR]

Aims: The persistence of atrial fibrillation (AF) has been associated with differential clinical outcomes, with studies showing that persistent and permanent AF results in increased morbidity and mortality when compared to the paroxysmal subtype. Given the established prognostic implications of AF subtype, we sought to discern the clinical and structural cardiac parameters associated with persistent/ permanent AF. Materials and methods: Consecutive patients admitted to our institution between January 2013 and January 2018 with a primary diagnosis of non‐valvular AF who underwent comprehensive transthoracic echocardiography were retrospectively appraised. Assessment of clinical and echocardiographic parameters was undertaken and compared according to AF subtype. Results: Of 1010 patients, 665 (mean age 66.8 ± 13.5 years, 53% men) had comprehensive transthoracic echocardiography on index admission and were included in the primary analysis. The majority of patients (n = 468; 70%) had paroxysmal AF while 197 (30%) had persistent/ permanent AF. Multivariable logistic regression analysis showed that heart failure (adjusted OR 3.135; 95% CI 2.099 to 4.682, P <.001), right atrial (RA) area ≥18 cm2 (adjusted OR 2.147; 95% CI 1.413 to 3.261, P <.001) and left atrial emptying fraction (LAEF) ≤34% (adjusted OR 2.959; 95% CI 1.991 to 4.398, P <.001) were independent predictors of persistent /permanent AF. Conclusions: The presence of heart failure, increased RA size and impaired LA function were associated with persistent/ permanent AF. These clinical and cardiac structural risk markers of AF persistence may identify a target population for early intervention to prevent adverse cardiovascular outcomes. [ABSTRACT FROM AUTHOR]

Background: Left atrial (LA) deformation during the reservoir phase (LASr) has demonstrated strong prognostic value in different clinical settings. Although determinants of left atrial reservoir strain including left atrial relaxation, left atrial compliance, and left ventricular longitudinal systolic function are fairly well defined, there is incomplete information regarding the effect of left atrial volume on this relationship which is the focus of our study., Method: Consecutive patients without prior cardiac disease referred for transthoracic echocardiography were prospectively recruited. All participants underwent clinical assessment, transthoracic echocardiography (TTE), and screening exercise stress test. Only patients with normal left ventricular ejection fraction (LVEF) without left ventricular hypertrophy (LVH) or myocardial ischemia on stress testing were included., Results: A total of 260 patients (57% male, mean age 59 ± 14 years) were included. 70% had hypertension, 33% had diabetes mellitus, and 31% had both HTN and DM. On multivariate analysis, age, e', LAVI, and LV GLS (P < .01 for all) showed an independent association with LASr. Of interest, at lower tertiles of LAVI, a linear decrease in LASr was observed parallel to worsening LV GLS, whilst at higher tertiles of LAVI, the reduction in LASr was non-linear implying that LA enlargement, consequent to LA remodeling, had an incremental effect on LASr., Conclusion: Age, e', LV GLS, and LAVI were independently associated with LASr. LA remodeling reflected by larger LAVI had an incremental negative association with LASr independent of LV GLS., (© 2020 Wiley Periodicals LLC.)