Atrial Function and the Pressure–Strain Relationship in Patients with Fontan Circulation
Abstract
PURPOSE: Atrial function is associated with exercise tolerance and survival in patients with Fontan circulation. Although atrial function is often evaluated using strain parameters, changes in atrial pressure are also important but have not been well studied. This study aimed to investigate the atrial pressure-strain relationship in patients with Fontan circulation using data from cardiac catheterization and MRI. METHODS: We retrospectively included 16 patients (median age: 12 years) who underwent cardiac MRI between 2020 and 2026, and 10 control patients (median age: 8.5 years). Atrial strain values were evaluated from 4-chamber cine MRI images. Pulmonary artery wedge pressure waveforms were used as a surrogate for atrial pressure. The pressure-strain index was calculated as an integrated measure of atrial pressure and strain. RESULTS: , P = 0.007). Reservoir and conduit strains were lower in the Fontan group (reservoir strain: 16.7 vs. 26.2%, P < 0.001; conduit strain: 6.2 vs. 18.7%, P < 0.001); however, no significant difference was observed in pump strain between the groups. No significant difference was also noted in pressure-strain index between the 2 groups (0.2 vs. 0.2, P = 0.417). CONCLUSION: In patients with Fontan physiology, reservoir and conduit strain were lower than in controls. In contrast, atrial pressure-strain relationship was not clearly associated with conventional Fontan hemodynamic parameters. These findings suggest that the physiological significance of atrial pressure-strain relationship in the Fontan circulation remains uncertain.
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BibTeX
@article{oka2026atrial,
title = {{Atrial Function and the Pressure–Strain Relationship in Patients with Fontan Circulation}},
author = {Hideharu Oka and Yuki Shibagaki and Keita Ito and Kouichi Nakau and Satoru Takahashi},
journal = {Magnetic Resonance in Medical Sciences},
year = {2026},
month = sep,
doi = {10.2463/mrms.mp.2026-0126},
url = {https://www.jstage.jst.go.jp/article/mrms/25/4/25_mp.2026-0126/_article},
note = {CC BY},
}
RIS
TY - JOUR
TI - Atrial Function and the Pressure–Strain Relationship in Patients with Fontan Circulation
AU - Hideharu Oka
AU - Yuki Shibagaki
AU - Keita Ito
AU - Kouichi Nakau
AU - Satoru Takahashi
PY - 2026
DA - 2026/09/11
JO - Magnetic Resonance in Medical Sciences
DO - 10.2463/mrms.mp.2026-0126
UR - https://www.jstage.jst.go.jp/article/mrms/25/4/25_mp.2026-0126/_article
AB - PURPOSE: Atrial function is associated with exercise tolerance and survival in patients with Fontan circulation. Although atrial function is often evaluated using strain parameters, changes in atrial pressure are also important but have not been well studied. This study aimed to investigate the atrial pressure-strain relationship in patients with Fontan circulation using data from cardiac catheterization and MRI. METHODS: We retrospectively included 16 patients (median age: 12 years) who underwent cardiac MRI between 2020 and 2026, and 10 control patients (median age: 8.5 years). Atrial strain values were evaluated from 4-chamber cine MRI images. Pulmonary artery wedge pressure waveforms were used as a surrogate for atrial pressure. The pressure-strain index was calculated as an integrated measure of atrial pressure and strain. RESULTS: , P = 0.007). Reservoir and conduit strains were lower in the Fontan group (reservoir strain: 16.7 vs. 26.2%, P < 0.001; conduit strain: 6.2 vs. 18.7%, P < 0.001); however, no significant difference was observed in pump strain between the groups. No significant difference was also noted in pressure-strain index between the 2 groups (0.2 vs. 0.2, P = 0.417). CONCLUSION: In patients with Fontan physiology, reservoir and conduit strain were lower than in controls. In contrast, atrial pressure-strain relationship was not clearly associated with conventional Fontan hemodynamic parameters. These findings suggest that the physiological significance of atrial pressure-strain relationship in the Fontan circulation remains uncertain.
SN - 1880-2206
SN - 1347-3182
ER -