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The prospective observational study on the utility of respiratory stability time (RST) as a predictive indicator of cardiac events in heart failure patients

Basic Information

Recruitment status	Recruiting
Health condition(s) or Problem(s) studied	Chronic heart failure
Date of first enrollment	19/06/2025
Target sample size	100
Countries of recruitment
Study type	Observational
Intervention(s)

Outcome(s)

Primary Outcome	1) Comparison of the 3-day average RST before discharge between cardiac event and non-event groups. 2)Optimal cutoff value of the 3-day average RST before discharge for predicting cardiac events.
Secondary Outcome	1)Comparison of post-discharge heart failure-related hospitalization and mortality between two groups divided by the median 3-day average RST. 2)Comparison of post-discharge heart failure-related hospitalization and mortality between two groups based on RST change rate.

Key inclusion & exclusion criteria

Age minimum	>= 20age old
Age maximum	Not applicable
Gender	Both
Include criteria	1)Patients hospitalized for heart failure treatment at Gifu Heart Center. 2)20age old over.
Exclude criteria	1)Patients with no spontaneous breathing. 2)Patients with obvious chronic obstructive pulmonary disease (hyperinflation of the lung field and lowering and flattening of the diaphragm on chest X-ray). 3)Pregnant 4)Patients who have been participating in other intervention studies. 5)Patients who are judged to be inappropriate for this study by investigators.