Abstract
Objectives
Left ventricle function directly impacts left atrial (LA) conduit function, and LA conduit strain is associated with exercise intolerance in patients with heart failure with preserved ejection fraction (HFpEF). Pulmonary capillary wedge pressure (PCWP) before and during exercise is the current gold standard for diagnosing HFpEF. Post-exercise ΔPCWP can lead to worse long-term outcomes. This study examined the correlation between LA strain and post-exercise ΔPCWP in patients with HFpEF.
Methods
We enrolled 100 subjects, including 74 with HFpEF and 26 with non-cardiac dyspnea, from November 2017 to December 2020. Subjects underwent echocardiography, invasive cardiac catheterization, and expired gas analysis at rest and during exercise. Arterial blood pressure, right atrial pressure, pulmonary artery pressure, and PCWP were recorded during cardiac catheterization. Cardiac output, stroke volume, pulmonary vascular resistance, pulmonary artery compliance, systemic vascular resistance, and LV stroke work were calculated using standard formulas.
Results
Exercise LA conduit strain significantly correlated with both post-exercise ΔPCWP (r = − 0.707, p < 0.001) and exercise PCWP (r = − 0.659; p < 0.001). Exercise LA conduit strain differentiated patients who did and did not meet the 2016 European Society of Cardiology HFpEF criteria with an area under the curve of 0.69 (95% confidence interval, 0.548–0.831) using a cutoff value of 14.25, with a sensitivity of 0.64 and a specificity of 0.68.
Conclusions
Exercise LA conduit strain significantly correlates with post-exercise ΔPCWP and has a comparable power to identify patients with HFpEF. Additional studies are warranted to confirm the ability of LA conduit strain to predict long-term outcomes among patients with HFpEF.
Clinical relevance statement
Exercise left atrial conduit strain was highly associated with the difference of post-exercise pulmonary capillary wedge pressure and may indicate increased mortality risk in patients with heart failure with preserved ejection fraction, and also has comparable diagnostic ability.
Key Points
• Left atrial conduit strain is associated with exercise intolerance in patients with heart failure with preserved ejection fraction.
• Left atrial conduit strain during exercise can identify patients with heart failure with preserved ejection fraction.
• Exercise left atrial conduit strain significantly correlates with the difference of pulmonary capillary wedge pressure during and before exercise which might predict the long-term outcomes of heart failure with preserved ejection fraction patients.
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Abbreviations
- A:
-
Late mitral inflow velocity
- ACEi:
-
Angiotensin-converting enzyme inhibitors
- AUC:
-
Area under the curve
- BP:
-
Blood pressure
- CCB:
-
Calcium channel blocker
- CI:
-
Confidence interval
- CMR:
-
Cardiac magnetic resonance
- CO:
-
Cardiac output
- E:
-
Early mitral inflow velocity
- e′:
-
Early diastolic mitral annular velocity
- ESC:
-
European Society of Cardiology
- HFA:
-
Heart Failure Association
- HFpEF:
-
Heart failure with preserved ejection fraction
- HR:
-
Heart rate
- LA:
-
Left atrial
- LV:
-
Left ventricle
- LVEDD:
-
Left ventricular end-diastolic diameter
- LVEDS:
-
Left ventricular end-systolic diameter
- LVEF:
-
Left ventricle ejection fraction
- NCD:
-
Non-cardiac dyspnea
- NP:
-
Natriuretic peptide
- NT-proBNP:
-
N-terminal pro-brain natriuretic peptide
- NTUH:
-
National Taiwan University Hospital
- PA:
-
Pulmonary artery
- PAP:
-
Pulmonary artery pressure
- PCWP:
-
Pulmonary capillary wedge pressure
- PVR:
-
Pulmonary vascular resistance
- RA:
-
Right atrial
- RAP:
-
Right atrial pressure
- SD:
-
Standard deviation
- SV:
-
Stroke volume
- SVR:
-
Systemic vascular resistance
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Funding
This work was supported in part by the National Science Council of the Republic of China (NSC107-2314-B-002 -265 -MY3). The funders of the study had no role in study design, data collection, data analysis, data interpretation, or writing of the report. National science and technology council 112-2314-B-002 -193 - and NTUH-VGH cooperation plan VN112-01.
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The scientific guarantor of this publication is Cho-Kai Wu.
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Statistics and biometry
No complex statistical methods were necessary for this paper.
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Written informed consent was obtained from all subjects (patients) in this study.
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This study was proved by the institutional review board of the National Taiwan University Hospital (No. 201908057RINC).
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• prospective
• case–control study
• performed at one institution
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Cheng, JF., Huang, PS., Chen, ZW. et al. Post-exercise left atrial conduit strain predicted hemodynamic change in heart failure with preserved ejection fraction. Eur Radiol 34, 1825–1835 (2024). https://doi.org/10.1007/s00330-023-10142-z
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DOI: https://doi.org/10.1007/s00330-023-10142-z