What does this research mean for the field?

In patients with mitral stenosis and MVA <1.5 cm2, peak VO2 was significantly lower at 13.7 mL/kg/min compared to 16.2 mL/kg/min in those without cardiac issues (p=0.027). Novelty: ClaimNovelty.CONFIRMATORY. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

This study aims to assess hemodynamic responses during exercise in patients with mitral stenosis and identify predictors of exercise capacity.

February 6, 2026European Heart Journal

Hemodynamic responses to exercise and predictors of exercise capacity in patients with mitral stenosis: exercise catheterization study

Q: What are the key findings of this study?

Patients with mitral stenosis (MVA <1.5 cm2) exhibited significantly lower peak oxygen consumption compared to those with non-cardiac dyspnea (13.7 vs 16.2 mL/kg/min, p=0.027).

Q: What is the clinical evidence from this study?

Study design: Observational. Population: Mitral stenosis (n=47). Intervention: Mitral stenosis (MVA <1.5 cm2) vs. Non-cardiac dyspnea without heart failure. Primary outcome: Peak oxygen consumption (Peak VO2) (p=0.027).

Q: What question did this study set out to answer?

This study aims to assess hemodynamic responses during exercise in patients with mitral stenosis and identify predictors of exercise capacity.

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Key result

LV-GLS and stroke volume index outperform baseline MVA and MDPG in predicting mitral stenosis exercise capacity.

P=0.027
n=47

Why the study?

Although an MVA <1.5 cm2 indicates intervention in mitral stenosis, patients in this group may exhibit heterogeneous exercise tolerance.

What are the hemodynamic responses to exercise and predictors of exercise capacity in patients with mitral stenosis?

Population

30 MS patients with MVA <1.5 cm2 and 17 patients with non-cardiac dyspnea

Comparison

Mitral stenosis vs non-cardiac dyspnea without evidence of heart failure

Design

Prospective study

Authors

SBS H BangSamsung Medical Center JKJ H KimSamsung Medical Center KCK H ChoiSamsung Medical Center

Discussion

Member takes

Implication

LV-GLS and continuity equation MVA may better inform exercise capacity assessment in mitral stenosis than resting metrics; leaves open prospective validation before clinical adoption.

Key Points

This study aims to assess hemodynamic responses during exercise in patients with mitral stenosis and identify predictors of exercise capacity.
Conducted a prospective study with 30 patients having mitral valve area <1.5 cm2 and 17 patients with non-cardiac dyspnea.
Performed exercise catheterization to measure hemodynamic parameters at rest and peak exercise using a supine bicycle.
Determined exercise capacity through peak oxygen consumption (Peak VO2).
The MS group had a median mitral valve area of 1.1 cm2 and a mean diastolic pressure gradient of 8.5 mmHg.
At peak exercise, the MS group had a pulmonary artery wedge pressure of 38.0 mmHg compared to 14.0 mmHg in the NCD group.
Peak VO2 was lower in the MS group (13.7 mL/kg/min) than in the NCD group (16.2 mL/kg/min, p=0.027).
The cardiac index significantly decreased in the MS group at peak exercise (5.3 L/min/m2 compared to 8.3 L/min/m2, p<0.001).
In the MS group, left ventricular global longitudinal strain and stroke volume index were predictors of peak VO2.

Study Design

Type

Observational (n=47)

Structured PICO

What are the hemodynamic responses to exercise and predictors of exercise capacity in patients with mitral stenosis?

Population

47 patients, comprising 30 with mitral stenosis (MVA <1.5 cm2) and 17 with non-cardiac dyspnea, who underwent exercise cardiac catheterization.

Exposure

Exercise cardiac catheterization using a supine bicycle

Comparator

Patients with non-cardiac dyspnea without evidence of heart failure

Outcome

Hemodynamic parameters at rest and at peak exercise, and exercise capacity determined by peak oxygen consumption (Peak VO2)surrogate

Main Result

Absolute Event Rate: 13.7% vs 16.2%

p-value: p=0.027

In patients with advanced mitral stenosis, exercise tolerance is limited and determined by left ventricular global longitudinal strain rather than resting mitral valve area or pressure gradients.

Cite This Study

Bang et al. (2025) conducted an observational in Mitral stenosis (n=47). Mitral stenosis (MVA <1.5 cm2) vs. Non-cardiac dyspnea without heart failure was evaluated on Peak oxygen consumption (Peak VO2) (p=0.027). Patients with mitral stenosis (MVA <1.5 cm2) exhibited significantly lower peak oxygen consumption compared to those with non-cardiac dyspnea (13.7 vs 16.2 mL/kg/min, p=0.027).

synapsesocial.com/papers/6985859b8f7c464f2300913f https://doi.org/10.1093/eurheartj/ehaf784.2464

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Implication

LV-GLS and continuity equation MVA may better inform exercise capacity assessment in mitral stenosis than resting metrics; leaves open prospective validation before clinical adoption.

Hemodynamic responses to exercise and predictors of exercise capacity in patients with mitral stenosis: exercise catheterization study

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Main Result

Cite This Study

Hemodynamic responses to exercise and predictors of exercise capacity in patients with mitral stenosis: exercise catheterization study

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Main Result

Cite This Study

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