Recommendations for the Evaluation of Left Ventricular Diastolic Function by Echocardiography: An Update from the American Society of Echocardiography and the European Association of Cardiovascular Imaging

Prognostic value of tissue Doppler E/e' ratio in hypertension patients with preserved left ventricular ejection fraction

OBJECTIVES

This study aims to investigate the association of tissue Doppler E/e' with cardiac events in hypertension patients, independent of and incremental to clinical and left ventricular geometric patterns.

METHODS

We retrospectively enrolled 222 asymptomatic nonischemic patients with hypertension who had echocardiogram in 2012 to evaluate tissue Doppler E/e'. Patients were followed up for cardiac events (cardiac events were defined as myocardial infarction, coronary revascularization procedures, new-onset angina (stable or unstable), heart failure). A cox regression was used to assess the association of the ratio of transmitral Doppler early filling velocity to tissue Doppler early diastolic mitral annular velocity (E/e') with cardiac events.

RESULTS

A total of 222 patients were included in analysis. There were 10 primary cardiac events during 3.2 ± 0.4 years follow-up. The E/e' ratio was the strongest predictor of cardiac events in Cox-proportional hazards models. Following adjustment for covariates, a unit rise in the E/e' ratio was associated with a 26% increment in risk of a cardiac event (HR 1.26, CI 1.06-1.50, p = 0.008). When E/e' ＞14 the hazard ratio of cardiac event was significantly increased compared with E/e' ≤ 14 in Kaplan-Meier analysis (log-rank ratio, 16.26; p ＜ 0.001).

CONCLUSIONS

E/e', a non-invasive estimate of left ventricular filling pressure, predicts cardiac events in hypertensive population with preserved left ventricular ejection fraction, independent of and incremental to clinical and left ventricular geometric patterns. E/e' represents an early, effective tool for cardiovascular risk stratification in hypertension population.

Reduced Myocardial Flow Reserve Is Associated With Diastolic Dysfunction and Decreased Left Atrial Strain in Patients With Normal Ejection Fraction and Epicardial Perfusion

INTRODUCTION

Coronary microvascular dysfunction (MVD) may contribute to the pathogenesis of heart failure with preserved ejection fraction (HFpEF). Using myocardial flow reserve (MFR) measured by positron emission tomography (PET) as an assessment of microvascular function, we hypothesized that abnormal MFR is associated with LV diastolic dysfunction (DD) and reduced LV and LA strain in patients with risk factors for HFpEF and normal epicardial perfusion on cardiac PET.

METHODS AND RESULTS

Retrospective study of patients without heart failure who underwent cardiac rubidium-82 PET and echocardiography. Global MFR was calculated as the ratio of global stress to rest myocardial blood flow. Echocardiographic measures of diastolic function were recorded. Global longitudinal LA and LV strain were measured with a 2-dimensional speckle-tracking technique. Relationships among MFR and echocardiographic measures were assessed with linear regression, analysis of variance, and test for trend. Seventy-three patients (age 64 ± 11 years, 52% male) were identified with no epicardial perfusion defect on cardiac PET and an ejection fraction ≥50%. Decreased MFR was associated with LV DD (P = .02) and increased E/e', an estimation of LV filling pressure (low E/e' [<8] vs. high E/e' [>15], P < .001). MFR was associated with LA strain independent of age, gender, and common comorbidities (adjusted β = 2.6% per unit MFR, P = 0.046); however, MFR was only marginally related to LV strain.

CONCLUSIONS

In patients with risk factors for HFpEF, MVD assessed with MFR was associated with DD, increased estimated LV filling pressure, and abnormal LA strain.

The impact of the latest echocardiographic chamber quantification recommendations on the prediction of left atrial appendage thrombus presence by transthoracic echocardiography

INTRODUCTION

The latest recommendations for echocardiographic chamber quantification have implemented updated normal values for all cardiac chambers.

PURPOSE

To evaluate the incidence of normal and abnormal values of routine echocardiographic parameters such as left ventricular ejection fraction (LVEF) and left atrial volume indexed to body surface area (LAVi) in patients with non-valvular atrial fibrillation (AF) and to determine the influence of LVEF and LAVi reclassification on the prediction of LAAT by transthoracic echocardiography.

METHODS

We retrospectively analysed the database of 1674 transesophageal echocardiograms performed between 2012 and 2015 in our echo lab. The study involved patients (mean age 70 ± 7 years, 80% men) with paroxysmal or persistent AF (35 patients with left atrial appendage thrombus [LAAT] and 35 sex- and age-matched controls without LAAT). LVEF and LAVi were categorised in two ways: semi-quantitative using four-degree scale (normal or abnormal graded from mild and moderate to severe) and qualitative (normal vs. abnormal).

RESULTS

We reclassified 6 (9%) and 4 (6%) patients with regard to LVEF as well as 38 (54%) and 16 (23%) with regard to LAVi on semi-quantitative and qualitative scale, respectively. After adjustment for effective anticoagulation and approved risk factors in the multivariate models, we identified LVEF categorised in semi-quantitative manner according to both documents, LAVi categorised in a binary manner by new guidelines and semi-quantitative scale by both recommendations as independently associated with LAAT.

CONCLUSIONS

Differentiation between normal and abnormal value enhanced the diagnostic meaning of LAVi in the aspect of higher LAAT risk. LVEF reclassification had no significant influence.

Emergency physician use of tissue Doppler bedside echocardiography in detecting diastolic dysfunction: an exploratory study

Introduction

This study evaluates the agreement between emergency physician (EP) assessment of diastolic dysfunction (DD) by a simplified approach using average peak mitral excursion velocity (eʹ_A) and an independent cardiologist’s diagnosis of DD by estimating left atrial (LA) pressure using American Society of Echocardiography (ASE) guidelines.

Methods

This was a secondary analysis of 48 limited bedside echocardiograms (LBE) performed as a part of a research study of patients presenting to the Emergency Department (ED) with elevated blood pressure but without decompensated heart failure. EPs diagnosed DD based on eʹ_A < 9 cm/s alone. A blinded board-certified cardiologist reviewed LBEs to estimate LA filling pressures following ASE guidelines. An unweighted kappa measure was calculated to determine agreement between EP and cardiologist.

Results

Six LBEs were deemed indeterminate by the cardiologist and excluded from the analysis. Agreement was reached in 41 out of 48 cases (85.4%). The unweighted kappa coefficient was 0.74 (95% CI 0.57–0.92). EPs identified 18 out of 20 LBEs diagnosed with diastolic dysfunction by the cardiologist.

Conclusion

There is a good agreement between (eʹ_A) by EP and cardiologist interpretation of LBEs. Future studies should investigate this simplified approach as a one-step method of screening for LV diastolic dysfunction in the ED.

Reference Ranges and Physiologic Variations of Left E/e' Ratio in Healthy Adults: Clinical and Echocardiographic Correlates

Background:

Transthoracic Doppler echocardiographic examination is commonly performed to define the diastolic ventricular function since it is widely available, noninvasive, and inexpensive with respect to other diagnostic imaging modalities. However, data regarding age- and gender-matched reference values are scanty and sometimes conflicting. This study aims to explore the physiologic variations of left ventricular (LV) E/e' ratio as assessed in a large cohort of healthy adults and to investigate clinical and echocardiographic correlates.

Methods:

From June 2007 to February 2014, 1168 healthy Caucasian adults (mean age 45.1 ± 15.6 years) performed standard echocardiographic examination (transthoracic echocardiogram).

Results:

E/e' constantly increases across all the age classes (P < 0.0001, analyses of variance both for males and females) with a strong statistically significant linear positive correlation with age. Stepwise multiple linear regression analysis identified age (P < 0.0001), LV mass (P < 0.001), LV end-diastolic volume (P < 0.01), and left atrial volume (P < 0.001) as the only independent determinants of E/e' ratio (model R² = 0.54, P < 0.0001).

Conclusions:

In healthy subjects, transmitral E velocity to e' ratio changes in relation to the age: it increased with a statistically significant correlation in individuals older than 60 years. Hence, differences related to demographic and anthropometric measurements may potentially develop a misclassification of otherwise normal individuals when established on dichotomically suggested normal reference values. Our study can demonstrate that it is indispensable to apply specific cutoff related to the age and gender to properly assess LV diastolic function.

[Sonographic Evaluation Algorithm for Acute Dyspnea]

The goal in emergency medicine is to provide a patient with dyspnea with the optimal therapy without delay, even when the definitive diagnosis has not yet been ascertained. The focused lung and heart ultrasound is a diagnostic resource that can be deployed immediately and repeatedly, and which rapidly provides the treating physician with essential information for providing therapy. Certain diagnoses (pneumothorax, pleural effusion, pericardial effusion) can be identified based on ultrasound. Other findings, including patient interview and physical exam, must also be considered in order to assess the clinical relevance. Further diagnoses can be made only after combining all findings (lung embolism, cardiac insufficiency with lung edema).

Arterial Thickness and Stiffness Are Independently Associated with Left Ventricular Strain

BACKGROUND

The aim of this study was to examine the association between myocardial strain and arterial thickness and stiffness in young adults. Increased common carotid artery intima media thickness and peripheral arterial stiffness are known to precede coronary artery disease and cardiovascular (CV) events such as myocardial infarction and congestive heart failure. However, subclinical cardiac dysfunction can be detected in high-risk adults by myocardial strain echocardiography. The authors hypothesized that increased carotid artery intima media thickness would be associated with abnormal myocardial strain in young subjects who had obesity and type 2 diabetes mellitus.

METHODS

CV risk factors were collected in 338 young adults participating in a prospective, cross-sectional study. The CV parameters collected included intima-media thickness, peripheral arterial stiffness by brachial distensibility, and myocardial strain and strain rate. General linear models were constructed to determine if vascular structure and function measures were independently associated with myocardial strain and strain rate.

RESULTS

A linear relationship was found between global longitudinal strain obtained from the four-chamber view and global strain rate in systole and carotid intima-media thickness (four-chamber global longitudinal strain: β = 3.0, CV risk factor-adjusted R2 = 0.34; global strain rate in systole: β = 0.0053, R2 = 0.21; P ≤ .0001) and between four-chamber global longitudinal strain and lower brachial distensibility (β = -0.42, R2 = 0.22; P < .001).

CONCLUSIONS

Adverse changes in vascular structure and function are simultaneously present with reduced myocardial systolic function.

Optimizing Management of Heart Failure by Using Echo and Natriuretic Peptides in the Outpatient Unit

Chronic heart failure (HF) is an important public health problem and is associated with high morbidity, high mortality, and considerable healthcare costs. More than 90% of hospitalizations due to worsening HF result from elevations of left ventricular (LV) filling pressures and fluid overload, which are often accompanied by the increased synthesis and secretion of natriuretic peptides (NPs). Furthermore, persistently abnormal LV filling pressures and a rise in NP circulating levels are well known indicators of poor prognosis. Frequent office visits with the resulting evaluation and management are most often needed. The growing pressure from hospital readmissions in HF patients is shifting the focus of interest from traditionally symptom-guided care to a more specific patient-centered follow-up care based on clinical findings, BNP and echo. Recent studies supported the value of serial NP measurements and Doppler echocardiographic biomarkers of elevated LV filling pressures as tools to scrutinize patients with impending clinically overt HF. Therefore, combination of echo and pulsed-wave blood-flow and tissue Doppler with NPs appears valuable in guiding ambulatory HF management, since they are potentially useful to distinguish stable patients from those at high risk of decompensation.

Systolic time ratio measured by impedance cardiography accurately screens left ventricular diastolic dysfunction in patients with arterial hypertension

Background

The use of impedance cardiography (ICG) may play a role in the assessment of cardiac effects of hypertension (HT), especially its hemodynamic features. Hypertensive heart disease involves structural changes and alterations in left ventricular geometry that end up causing systolic and/or diastolic dysfunction. The IMPEDDANS study aims to assess the usefulness of ICG for the screening of left ventricular diastolic dysfunction (LVDD) in patients with HT.

Methods

Patients with HT were assessed by echocardiography and ICG. Receiver-operating characteristic curve and the area under the curve were used to assess the discriminative ability of the parameters obtained by ICG to identify LVDD, as diagnosed by echocardiography.

Results

ICG derived pre-ejection period (PEP), left ventricle ejection time (LVET), systolic time ratio (STR) and D wave were associated (p < 0.001) with LVDD diagnosis, with good discriminative ability: PEP (AUC 0.81; 95% CI 0.74–0.89), LVET (AUC 0.82; 95% CI 0.75–0.88), STR (AUC 0.97; 95% CI 0.94–1.00) and presence of D wave (AUC = 0.87; 95% CI 0.82–0.93). STR ≥ 0.30 outperformed the other parameters (sensitivity of 98.0%, specificity of 90.2%, positive predictive value of 95.2%, and negative predictive value of 96.1%).

Conclusion

The ICG derived value of STR allows the accurate screening of LVDD in patients with HT. It might as well be used for follow up assessment.

Trial registration

The study protocol was retrospectively registered as IMPEDDANS on ClinicalTrials.gov (ID: NCT03209141) on July 6, 2017.

Diastolic Function Is Impaired in Patients With Prehypertension: Data From the EPIPorto Study

INTRODUCTION AND OBJECTIVES

Hypertension causes subclinical changes in left ventricular structure and function, namely diastolic dysfunction. Diastolic dysfunction is a predictor of heart failure, being involved in the association between hypertension and heart failure with preserved ejection fraction. We aimed to determine whether patients with prehypertension have early changes in diastolic function in a large community-based cohort of asymptomatic adults.

METHODS

A cross-sectional evaluation was performed of a community-based cohort consisting of 925 adults, aged 45 years or older, without known cardiovascular disease. All participants underwent detailed clinical and echocardiographic examination. The participants were categorized according to the European guidelines for the classification of office blood pressure (BP) levels as optimal, prehypertensive (normal and high-normal categories), and hypertensive. Diastolic function was evaluated by echocardiography using e' velocities and E/e' ratio. Diastolic dysfunction was defined using the 2016 ASE/EACVI Joint Recommendations and a 2017 clinically-oriented algorithm.

RESULTS

In this cohort (61.5 ± 10.5 years; 37% men), prehypertension was present in 30.4% and hypertension in 51.0%. Using optimal BP as the reference, there was a progressive decrease of e' velocity in prehypertensive and hypertensive individuals (12.2 ± 3.5 vs 11.3 ± 3.1 vs 9.6 ± 2.9cm/s, respectively; P for trend < .001). After multivariable adjustment, both BP categories were independent predictors of a lower e' velocity (β = -0.56, P = .035 for prehypertension and β = -1.08, P < .001 for hypertension).

CONCLUSIONS

In this large community-based cohort, adults with prehypertension already showed impaired cardiac relaxation before the onset of hypertension.

E/a´ ratio a simple detector of left ventricular dysfunction in patients with decreased ejection fraction

OBJECTIVES

Could a diastolic dysfunction and an increased LV-filling pressure according to ASE/EACVI guidelines be detected or ruled out by the E/a´ratio in patients with decreased ejection fraction.

DESIGN

We retrospectively evaluated the diastolic function of 113 unselected in-hospital patients, aged 40-84 years, in sinus rhythm and with no or mild valve disease, having a decreased systolic function (EF ≤50%) using the new ASE/EACVI guidelines and compared these results with the E/a´ratio derived from the E wave in the mitral flow and the a´velocity in the tissue Doppler.

RESULTS

The average E/a´ ratio is a strong predictor of a grade II-III diastolic dysfunction and an elevated left atrial pressure according to ASE/EACVI guidelines with an AUC of 0.92. An average E/a´ ratio with a cut-off >10 had a sensitivity of 97.6% and a negative predictive value of 98.2% in detecting or ruling out a grade II-III diastolic dysfunction and an elevated left atrial pressure according to the current guidelines.

CONCLUSION

The average E/a´ ratio might be useful as a fast screening tool of a left ventricular dysfunction and an increased left ventricular filling pressure in patients with a decreased ejection fraction.

Association of Active and Passive Components of LV Diastolic Filling With Exercise Intolerance in Heart Failure With Preserved Ejection Fraction: Mechanistic Insights From Spironolactone Response

OBJECTIVES

This study sought to investigate the association of left ventricular (LV) untwisting rate (UT) and E/e' ratio with the response of exercise capacity to spironolactone in heart failure with preserved ejection fraction (HFpEF).

BACKGROUND

In most patients with HFpEF, LV filling abnormalities represent a central component in the development of dyspnea. LV diastolic filling is determined by the interplay of passive (LV stiffness and myocardial collagen content, reflected by E/e' ratio) and active myocardial properties (UT, a precursor to isovolumic pressure decay and contributor to diastolic suction).

METHODS

In 194 patients with HFpEF (64 ± 8 years), a complete echocardiogram (including assessment of myocardial deformation and rotational mechanics) was performed. Echocardiography following maximal exercise was undertaken to assess LV systolic and diastolic responses to stress. A subset of 105 patients with an exercise-induced increase in estimated LV filling pressure were randomly assigned to spironolactone 25 mg (n = 51) or placebo (n = 54) for 6 months.

RESULTS

Baseline peak Vo₂ was associated with UT (β = 0.19; p = 0.01) and E/e' (β = -0.16; p = 0.03), independent of clinical data and exercise reserve in longitudinal deformation and ventricular-arterial coupling. An increase in peak Vo₂ with treatment was independently associated with changes in UT (β = 0.28; p = 0.003) and exertional increase in E/e' (β = -0.23; p = 0.01) from baseline to follow-up. A significant interaction with the use of spironolactone on peak Vo₂ was found for E/e' (p = 0.02) but not for UT (p = 0.62).

CONCLUSIONS

Both active and passive determinants of LV filling, as reflected by UT and E/e', contribute to reduced exercise capacity in HFpEF. Improvement in functional capacity with a 6-month therapy with spironolactone is associated with improvements in both indices. However, the possible mediating effect of this medication is observed only on E/e'.

Measures of subclinical cardiac dysfunction and increased filling pressures associate with pulmonary arterial pressure in the general population: results from the population-based Rotterdam Study

Pulmonary hypertension is associated with increased mortality and morbidity in the elderly population. Heart failure is a common cause of pulmonary hypertension. Yet, the relation between left heart parameters reflective of subclinical cardiac dysfunction and increased filling pressures, and pulmonary arterial pressures in the elderly population remains elusive. Within the population-based Rotterdam Study, 2592 unselected participants with a mean age of 72.6 years (61.4% women) had complete echocardiography data available. We studied the cross-sectional associations of left heart structure and systolic and diastolic function with echocardiographically measured pulmonary artery systolic pressure. Mean pulmonary artery systolic pressure was 25.4 mmHg. After multivariable-adjustment measures of both structure and function were independently associated with pulmonary artery systolic pressure: E/A ratio [0.63 mmHg (95% CI 0.35–0.91) per 1-SD increase], left atrial diameter [0.79 mmHg (0.50–1.09) per 1-SD increase], E/E′ ratio [1.27 mmHg (0.92–1.61) per 1-SD increase], left ventricular volume [0.62 mmHg (0.25–0.98) per 1-SD increase], fractional shortening [0.45 mmHg (0.17–0.74) per 1-SD increase], aortic root diameter [− 0.43 mmHg (− 0.72 to − 0.14) per 1-SD increase], mitral valve deceleration time [− 0.31 mmHg (− 0.57 to − 0.05) per 1-SD increase], and E′ [1.04 mmHg (0.66–1.42) per 1-SD increase]. Results did not materially differ when restricting the analyses to participants free of symptoms of shortness of breath. Structural and functional echocardiographic parameters of subclinical cardiac dysfunction and increased filling pressures are associated with pulmonary arterial pressures in the unselected general ageing population.

Evaluation of left ventricular diastolic function: state of the art after 35 years with Doppler assessment

Left ventricular (LV) diastolic function can be evaluated by echocardiographic indices of LV relaxation/restoring forces, diastolic compliance, and filling pressure. By using a combination of indices, diastolic function can be graded and LV filling pressure estimated with high feasibility and good accuracy. Evaluation of diastolic function is of particular importance in patients with unexplained exertional dyspnea or other symptoms or signs of heart failure which cannot be attributed to impaired LV systolic function and to assess filling pressure in patients with heart failure and reduced LV ejection fraction. Furthermore, grading of diastolic dysfunction can be used for risk assessment in asymptomatic subjects and in patients with heart disease.

Early detection of left ventricular diastolic dysfunction using conventional and speckle tracking echocardiography in a large animal model of metabolic dysfunction

Left ventricular (LV) diastolic dysfunction is one of the important mechanisms responsible for symptoms in patients with heart failure. The aim of the current study was to identify parameters that may be used to detect early signs of LV diastolic dysfunction in diabetic pigs on a high fat diet, using conventional and speckle tracking echocardiography. The study population consisted of 16 healthy Göttingen minipigs and 18 minipigs with experimentally induced metabolic dysfunction. Echocardiography measurements were performed at baseline and 3-month follow-up. The ratio of peak early (E) and late filling velocity (E/A ratio) and the ratio of E and the velocity of the mitral annulus early diastolic wave (E/Em ratio) did not change significantly in both groups. Peak untwisting velocity decreased in the metabolic dysfunction group (- 30.1 ± 18.5 vs. - 23.4 ± 15.5 °/ms) but not in controls (- 38.1 ± 23.6 vs. - 42.2 ± 23.0 °/ms), being significantly different between the groups at the 3-month time point (p < 0.05). In conclusion, whereas E/A ratio and E/Em ratio did not change significantly after 3 months of metabolic dysfunction, peak untwisting velocity was significantly decreased. Hence, peak untwisting velocity may serve as an important marker to detect early changes of LV diastolic dysfunction.

Diastolic Dysfunction is Common in Survivors of Pediatric Differentiated Thyroid Carcinoma

INTRODUCTION

Whether pediatric patients with differentiated thyroid carcinoma (DTC) are at risk of developing treatment-related adverse effects on cardiac function is unknown. We therefore studied in long-term survivors of pediatric DTC the prevalence of cardiac dysfunction and atrial fibrillation in relation to treatment variables, and the association between cardiac dysfunction and plasma biomarkers.

METHODS

In this nationwide prospective multicenter study, cardiac assessments were performed in 66 adult survivors of pediatric DTC (age at diagnosis ≤18 years and follow-up ≥5 years after diagnosis) treated in the Netherlands between 1970 and 2009. Assessment included echocardiography, plasma biomarkers (N-terminal pro-brain natriuretic peptide, high-sensitive troponin-T, galectin-3), and 24-hour Holter electrocardiography. Echocardiographic measurements were compared with retrospective data of 66 sex- and age-matched unaffected Dutch controls. Diastolic dysfunction was defined as an early diastolic septal and/or lateral tissue velocity (e') less than 2 SD of mean age-adjusted reference data.

RESULTS

The survivors (86.4% women) had at DTC diagnosis a median age of 16 years. Median follow-up was 17 years. Left ventricular ejection fraction <50% was found in one survivor, and median global longitudinal systolic strain was near normal. Diastolic dysfunction was present in 14 asymptomatic survivors (21.2%). Overall, diastolic function of survivors was lower compared with controls (e'mean 14.5 versus 15.8 cm/s, P = 0.006). Older attained age and higher waist circumference were associated with decreased diastolic function, whereas thyrotropin levels and cumulative administered radioiodine dose were not. In survivors, biomarkers were not associated with diastolic dysfunction; atrial fibrillation was not observed.

CONCLUSION

While systolic function is unaffected, diastolic dysfunction is frequently observed in asymptomatic long-term survivors of pediatric DTC, which may suggest early cardiac aging.

Cirrhotic cardiomyopathy: is there any correlation between the stage of cardiac impairment and the severity of liver disease?

Cirrhotic cardiomyopathy is associated with poor prognosis and risk of acute heart failure after liver transplantation or interventional procedures. We aimed to assess the relationship between the severity of cardiac impairment and hepatic disease. Eighty patients and eighty controls underwent echocardiography, tissue Doppler imaging and speckle tracking measures. We assess the correlation between echocardiographic parameters and Child and MELD scores. Systolic parameters function (s wave, p < 0.001) and global longitudinal strain (p < 0.001) as well as diastolic parameters were significantly more impaired in cirrhotic patients compared to controls. There were no differences among the different groups in 'Child score' regarding systolic function as well as diastolic function. Paradoxically, the left atrium size correlated positively to both Child (p = 0.01, r = 0.26) and MELD scores (p = 0.02, r = 0.24). Left ventricular ejection fraction was significantly lower in decompensated patients as compared to compensated patients(p = 0.02).. We did not identify any association between severity of liver disease and cardiac dysfunction. Therefore, a transthoracic echocardiography should be performed in all cirrhotic patients before interventional and surgical procedures regardless of the severity of liver disease.

Association between left atrial phasic conduit function and early atrial fibrillation recurrence in patients undergoing electrical cardioversion

Background

Diastolic dysfunction promotes atrial fibrillation (AF) inducing left atrial (LA) remodeling, with chamber dilation and fibrosis. Predominance of LA phasic conduit (LAC) function should reflect not only chamber alterations but also underlying left ventricular (LV) filling impairment. Thus, LAC was tested as possible predictor of early AF relapse after electrical cardioversion (EC).

Methods

96 consecutive patients, who underwent EC for persistent non-valvular AF, were prospectively enrolled. Immediately after successful EC (3 h ± 15 min), an echocardiographic apical four-chamber view was acquired with transmitral velocities, annular tissue Doppler and simultaneous LV and LA three-dimensional full-volume datasets. Then, from LA–LV volumetric curves we computed LAC as: [(LV maximum − LV minimum) − (LA maximum − LA minimum) volume], expressed as % LV stroke volume. LA pump, immediately post-EC, was assumed and verified as being negligible. Sinus rhythm persistence at 1 month was checked with ECG-Holter monitoring.

Results

At 1 month 62 patients were in sinus rhythm and 34 in AF. AF patients presented pre-EC higher E/é values (p = 0.012), no major LA volume differences (p = NS), but a stiffer LV cavity (p = 0.012) for a comparable LV capacitance (p = 0.461). Conduit contributed more (p < 0.001) to LV stroke volume in AF subpopulation. Multiple regression revealed LAC as the most significant AF predictor (p = 0.013), even after correction for biometric characteristics and pharmacotherapy (p = 0.008).

Conclusion

Our data suggest that LAC larger contribution to LV filling soon after EC reflects LA–LV stiffening, which skews atrioventricular interaction leading to AF perpetuation and makes conduit dominance a powerful predictor of early AF recurrence.

Electronic supplementary material

The online version of this article (10.1007/s00392-017-1188-9) contains supplementary material, which is available to authorized users.

Cardiac function in patients with polymyositis or dermatomyositis: a three-dimensional speckle-tracking echocardiography study

Cardiac event is a major cause of death in patients with idiopathic inflammatory myopathies (IIM). The most frequent IIMs are polymyositis (PM) and dermatomyositis (DM). The purpose of this study was to analyze cardiac involvement by three-dimensional speckle-tracking echocardiography (3D STE) in patients with PM or DM, and to identify the relationship of cardiac injury with clinical characteristics and disease-specific parameters. 60 PM/DM patients with preserved left ventricular ejection fraction and 30 matched healthy controls were assessed by conventional echocardiography, 3D STE with biventricular strain analysis and electrocardiogram. Compared to controls, patients with PM/DM had significantly diminished left ventricular global longitudinal systolic strain and right ventricular longitudinal systolic strain (LVGLS, - 20.3 ± 2.5 vs. - 23.4 ± 1.7%; RVLS, - 19.4 ± 4.2 vs - 24.8 ± 2.0%; both P < 0.001), and longer QTc intervals(421.0 ± 38.4 vs 400.6 ± 14.5 ms, P = 0.001). Multiple regression analysis showed that Myositis Damage Index (MDI) was independently associated with LVGLS (R² = 0.44, P = 0.002) and RVLS (R² = 0.56, P < 0.001) in PM/DM patients with established disease course more than 1 year. In multivariate analysis of pooled data for all the PM/DM patients, when MDI was excluded due to missing observations, disease duration correlated with worse LVGLS (R² = 0.24, P = 0.002), while concomitant interstitial lung disease correlated with worse RVLS (R² = 0.30, P < 0.001). Disease activity scores (Myositis Intention to Treat Activities Index) had a weak positive correlation with QTc intervals (r_sp = 0.31, P = 0.02). Our results suggest that cardiac injury in PM/DM is a long-term process and its severity depends on patients' heterogeneous clinical features and systemic disease burden.

Mechanical dyssynchrony alters left ventricular flow energetics in failing hearts with LBBB: a 4D flow CMR pilot study

The impact of left bundle branch block (LBBB) related mechanical dyssynchrony on left ventricular (LV) diastolic function remains unclear. 4D flow cardiovascular magnetic resonance (CMR) has provided reliable markers of LV dysfunction: reduced volume and kinetic energy (KE) of the portion of LV inflow which passes directly to outflow (Direct Flow) has been demonstrated in failing hearts compared to normal hearts. We sought to investigate the impact of mechanical dyssynchrony on diastolic function by comparing 4D flow in myopathic LVs with and without LBBB. CMR data were acquired at 3 T in 22 heart failure patients; 11 with LBBB and 11 without LBBB matched according to several demographic and clinical parameters. An established 4D flow analysis method was used to separate the LV end-diastolic (ED) volume into functional flow components based on the blood’s timing and route through the heart cavities. While the Direct Flow volume was not different between the groups, the KE possessed at ED was lower in LBBB patients (P = 0.018). Direct Flow entering the LV during early diastolic filling possessed less KE at ED in LBBB patients compared to non-LBBB patients, whereas no intergroup difference was observed during late filling. Pre-systolic KE of LV Direct Flow was reduced in patients with LBBB compared to matched patients with normal conduction. These intriguing findings propose that 4D flow specific measures can serve as markers of LV mechanical dyssynchrony in heart failure patients, and could possibly be investigated as predictors of response to cardiac resynchronization therapy.

Usefulness of Myocardial Annular Velocity Change During Mental Stress to Predict Cardiovascular Outcome in Patients With Coronary Artery Disease (From the Responses of Mental Stress-Induced Myocardial Ischemia to Escitalopram Treatment Trial)

Mental stress-induced myocardial ischemia is common and a prognostic factor of adverse cardiovascular outcomes in patients with coronary artery disease (CAD). The present study aimed at examining associations between mental stress-induced myocardial annular velocity (MAV) and cardiovascular outcome in patients with CAD. MAV, specifically, diastolic early (e'), diastolic late (a'), and systolic (s') velocities were obtained at rest and during mental stress testing in 224 patients with clinically stable CAD. Using Cox regression models, age, sex, and baseline-adjusted mental stress-induced MAV measures were examined as predictors of a priori defined composite event term that comprised all-cause mortality and/or nonfatal cardiovascular events, resulting in an unplanned hospitalization (major adverse cardiovascular events [MACE]). Median follow-up was 4 years. The sample was predominantly male, Caucasian with New York Heart Association functional class I and a mean age of 63 ± 10.2 years. MS-induced changes in e' (hazard ratio [HR] = .73) and s' (HR = .73) were significant (p <0.05) predictors of MACE, and the change in a' (HR = .74) was marginal (p = 0.05). The pattern of the relation for each MAV measure was such that patients with a greater decrease in e' and/or s' velocity had a higher probability of experiencing an MACE, and the association of the change in a' and MACE was marginal (p = 0.05), but the same tendency. The associations between MS-induced values of e' and a' for MACE were independent of resting levels. Mental stress-induced MAV changes independently predict an adverse cardiovascular outcome in patients with stable CAD.

Dietary Fat, Sugar Consumption, and Cardiorespiratory Fitness in Patients With Heart Failure With Preserved Ejection Fraction

Heart failure with preserved ejection fraction (HFpEF) is associated with obesity and, indirectly, with unhealthy diet. The role of dietary components in HFpEF is, however, largely unknown. In this study, the authors showed that in obese HFpEF patients, consumption of unsaturated fatty acids (UFA), was associated with better cardiorespiratory fitness, and UFA consumption correlated with better diastolic function and with greater fat-free mass. Similarly, mice fed with a high-fat diet rich in UFA and low in sugars had preserved myocardial function and reduced weight gain. Randomized clinical trials increasing dietary UFA consumption and reducing sugar consumption are warranted to confirm and expand our findings.

Thromboembolisms in atrial fibrillation and heart failure patients with a preserved ejection fraction (HFpEF) compared to those with a reduced ejection fraction (HFrEF)

Heart failure (HF) is classified into three clinical subtypes: HF with a preserved ejection fraction (HFpEF: EF ≥ 50%), HF with a mid-range ejection fraction (HFmrEF: 40 ≤ EF < 49%), and HF with a reduced ejection fraction (HFrEF: EF < 40%). These types often coexist with atrial fibrillation (AF). We investigated the rate of strokes/systemic embolisms (SSEs) in AF patients with HFpEF (AF-HFpEF) compared to that in those with HFrEF (AF-HFrEF: HFmrEF and HFrEF), and examined the independent predictors. We prospectively enrolled 1350 patients admitted to our hospital for worsening HF. We identified 301 patients with either AF-HFpEF (n = 129, 43%) or AF-HFrEF (n = 172, 57%). Compared to the patients with AF-HFrEF, those with AF-HFpEF were older and more likely to be female. Oral anticoagulant use was 63 vs. 66%, respectively. During a mean follow-up period of 26 months, 21 (7%) and 66 (22%) patients had SSEs and all-cause death, respectively. The crude annual rates of SSEs (3.9 vs. 2.7%, P = 0.47) were similar between the groups. In a multivariate Cox regression analysis, an age ≥ 75 years (hazard ratio 2.14, 95% confidence interval 1.32-3.58, P < 0.01) and the plasma B-type natriuretic peptide (BNP) level ≥ 341 pg/ml (hazard ratio 1.60, 95% confidence interval 1.07-2.39, P < 0.05) were associated with SSEs. The EF was not an independent predictor of SSEs (hazard ratio 1.01, 95% confidence interval 0.98-1.04, P = 0.51). There were no significant differences in the rates of SSEs between AF-HFpEF and AF-HFrEF. Patients with HF and concomitant AF should be treated with anticoagulants irrespective of EF.

Echocardiographic chamber quantification in a healthy Dutch population

Aim

For accurate interpretation of echocardiographic measurements normative data are required, which are provided by guidelines. For this article, the hypothesis was that these cannot be extrapolated to the Dutch population, since in Dutch clinical practice often higher values are found, which may not be pathological but physiological. Therefore this study aimed to 1) obtain and propose normative values for cardiac chamber quantification in a healthy Dutch population and 2) determine influences of baseline characteristics on these measurements.

Methods

Prospectively recruited healthy subjects, aged 20–72 years (at least 28 subjects per age decade, equally distributed for gender) underwent physical examination and 2D and 3D echocardiography. Both ventricles and atria were assessed and volumes were calculated.

Results

147 subjects were included (age 44 ± 14 years, 50% female). Overall, feasibility was good for both linear and volumetric measurements. Linear and volumetric parameters were consistently higher than current guidelines recommend, while functional parameters were in line with the guidelines. This was more so in the older population. 3D volumes were higher than 2D volumes. Gender dependency was seen in all body surface area (BSA) corrected volumes and with increasing age, ejection fractions decreased.

Conclusion

This study provides 2D and 3D echocardiographic reference ranges for both ventricles and atria derived from a healthy Dutch population. BSA indexed volumes are gender-dependent, age did not influence ventricular volumes and a rise in blood pressure was independently associated with increased right ventricular volumes. The higher volumes found may be indicative for the Dutch population being the tallest in the world.

Bariatric surgery as a treatment for heart failure: review of the literature and potential mechanisms

Heart failure due to severe obesity is a complex disease due to multiple mechanisms, including increased body mass, inflammation, and impaired cardiac metabolism that is complicated by obesity-associated co-morbidities, such as type 2 diabetes and obstructive sleep apnea. Bariatric surgery significantly improves cardiac geometry, function, and symptoms related to obesity cardiomyopathy. There is a consistently positive impact of bariatric surgery on diastolic function with the potential to significantly improve systolic function as measured by ejection fraction in patients with advanced heart failure. For end-stage heart failure patients, including those requiring mechanical circulatory support who are ineligible for organ transplant due to morbid obesity, bariatric surgery has been successfully used for weight loss as a bridge to cardiac transplantation.

The years 2015-2016 in the European Heart Journal-Cardiovascular Imaging. Part I

The multimodality cardiovascular imaging journal, European Heart Journal-Cardiovascular Imaging, was launched in 2012. It has gained an impressive impact factor of 5.99 during its 5 first years and is now established as the most important cardiovascular imaging journal in Europe. The most important studies from the journal's forth and fifth years will be highlighted in two reports. Part I of the review will focus on studies about myocardial function and risk prediction, myocardial ischaemia, and emerging techniques in cardiovascular imaging, while Part II will focus on valvular heart disease, heart failure, cardiomyopathies, and congenital heart disease.

Autonomic dysfunction is associated with cardiac remodelling in heart failure patients

Aims

Orthostatic hypotension (OH) is a cardinal sign of autonomic dysfunction and a common co‐morbidity in heart failure (HF). The role of autonomic dysfunction in the development of structural cardiac anomalies in HF patients has not been sufficiently explored. We aimed to assess relations between orthostatic blood pressure (BP) responses during active standing and echocardiographic changes in a series of patients admitted for HF.

Methods and results

One hundred and forty‐nine patients hospitalized for HF [mean age: 74 years; 30% women; ejection fraction (LVEF) 40 ± 16%] were examined with conventional echocardiograms and active‐standing test. Associations of cardiac remodelling parameters with the difference between supine and standing (after 3 min) systolic/diastolic BP were examined. Systolic BP decreased (−1.1 ± 15 mmHg), whereas diastolic BP increased (+1.0 ± 9.5 mmHg) after 3 min of active standing. A total of 34 patients (23%) met conventional OH criteria; i.e. systolic/diastolic BP decreases by ≥20/10 mmHg. In the multivariable linear regression analysis, adjusted for traditional cardiovascular risk factors and LVEF, a decrease in systolic BP upon standing was associated with greater left atrial volume [β per −10 mmHg: 2.37, standard error (SE) = 1.16, P = 0.043], and greater left ventricular mass (β per −10 mmHg: 5.67, SE = 2.24, P = 0.012), but not with other echocardiographic parameters. No significant associations were observed between signs of cardiac remodelling and decrease in diastolic BP.

Conclusions

Orthostatic decrease in systolic BP among older HF patients is associated with structural cardiac changes such as increased left atrial volume and left ventricular mass, independently of traditional risk factors and left ventricular dysfunction.

Fibroblast-specific TGF-β-Smad2/3 signaling underlies cardiac fibrosis

The master cytokine TGF-β mediates tissue fibrosis associated with inflammation and tissue injury. TGF-β induces fibroblast activation and differentiation into myofibroblasts that secrete extracellular matrix proteins. Canonical TGF-β signaling mobilizes Smad2 and Smad3 transcription factors that control fibrosis by promoting gene expression. However, the importance of TGF-β-Smad2/3 signaling in fibroblast-mediated cardiac fibrosis has not been directly evaluated in vivo. Here, we examined pressure overload-induced cardiac fibrosis in fibroblast- and myofibroblast-specific inducible Cre-expressing mouse lines with selective deletion of the TGF-β receptors Tgfbr1/2, Smad2, or Smad3. Fibroblast-specific deletion of Tgfbr1/2 or Smad3, but not Smad2, markedly reduced the pressure overload-induced fibrotic response as well as fibrosis mediated by a heart-specific, latency-resistant TGF-β mutant transgene. Interestingly, cardiac fibroblast-specific deletion of Tgfbr1/2, but not Smad2/3, attenuated the cardiac hypertrophic response to pressure overload stimulation. Mechanistically, loss of Smad2/3 from tissue-resident fibroblasts attenuated injury-induced cellular expansion within the heart and the expression of fibrosis-mediating genes. Deletion of Smad2/3 or Tgfbr1/2 from cardiac fibroblasts similarly inhibited the gene program for fibrosis and extracellular matrix remodeling, although deletion of Tgfbr1/2 uniquely altered expression of an array of regulatory genes involved in cardiomyocyte homeostasis and disease compensation. These findings implicate TGF-β-Smad2/3 signaling in activated tissue-resident cardiac fibroblasts as principal mediators of the fibrotic response.