Heart Failure and Sleep Disordered Breathing

Study Overview
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Brief Summary
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The purpose of this study is to analyze and summarize the characteristics of arrhythmia and heart rate variability of Chinese patients with three different types of heart failure combined with sleep disordered breathing based on the clinical data, to provide new diagnosis and treatment ideas for domestic patients, and then to improve the prognosis of patients betterly.

Official Title
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Characteristics of Arrhythmia and Heart Rate Variability in Patients With Heart Failure and Sleep Disordered Breathing

Conditions
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Heart Failure

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Age >18 years. The diagnosis of heart failure conforms to the criteria of the Chinese Guidelines for the Diagnosis and Treatment of Heart Failure . Echocardiography, dynamic electrocardiogram and polysomnography monitoring should be improved during the period of hospitalization. Patients with sleep apnea have not received standard treatment. Exclusion Criteria: Patients undergoing cardiac surgery in the past 6 weeks. Patients with acute decompensated heart failure or heart failure requiring oxygen therapy. All patients with sleep apnea who receive standard treatment. Patients who use pacemakers or implantable cardioverter defibrillators. The patient did not complete the echocardiography, dynamic electrocardiogram, and polysomnography monitoring during hospitalization.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| HFrEF group<br>HFrEF was defined as Left ventricular ejection fraction ≤40% | |
| HFmrEF group<br>HFmrEF was defined as Left ventricular ejection fraction 41% 49% | |
| HFpEF group<br>HFpEF was defined as Left ventricular ejection fraction ≥50% | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| heart failure and sleep apnea | analyze and summarize the characteristics of arrhythmia and heart rate variability of Chinese patients with three different types of heart failure combined with sleep-disordered breathing based on the clinical data. Collection of clinical data: general clinical data, physical signs, post-admission inspection indicators, and treatment conditions of patients collected from the electronic medical record system. Echocardiographic data mainly included ejection fraction, left atrial anterior-posterior diameter, and interventricular septum thickness, which were in millimeters; electrocardiogram examination mainly included Diagnosis type of arrhythmia by dynamic, the overall standard deviation of normal sinus R-R interval (SDNN), the average standard deviation of normal sinus R-R interval throughout the recording period (SDANN), which were in a millisecond, etc; The type and severity of sleep-disordered breathing and Apnea hypopnea index were obtained by polysomnography. | 24 hours | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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sleep disordered breathing, arrhythmia, heart rate variability