Retracted: Verifying the Usefulness of Pulmonary Blood Flow Studies in the Correction of Pulmonary Atresia and Ventricular Septal Defect with Major Aortopulmonary Collateral Arteries.

[This retracts the article DOI: 10.1155/2021/3483976.].

Retracted: Decreased Spp1 Expression in Acute Myocardial Infarction after Ischemia and Reperfusion Injury.

[This retracts the article DOI: 10.1155/2021/3925136.].

Retracted: Development and Validation of a Risk Prediction Model for Ventricular Arrhythmia in Elderly Patients with Coronary Heart Disease.

[This retracts the article DOI: 10.1155/2021/2283018.].

Retracted: Establishment of a Nomogram for Predicting Early Death in Viral Myocarditis.

[This retracts the article DOI: 10.1155/2021/9947034.].

Retracted: High-Density Lipoprotein Cholesterol in Young Nondiabetic Coronary Heart Disease Patients.

[This retracts the article DOI: 10.1155/2021/2970568.].

Retracted: The Long-Term Change of Arrhythmias after Transcatheter Closure of Perimembranous Ventricular Septal Defects.

[This retracts the article DOI: 10.1155/2021/1625915.].

Retracted: Clinical Study on Long-Term Sinus Reversion Rate and Left Atrial Function Recovery of Mitral Valve Disease with Atrial Fibrillation under Modified Surgical Radiofrequency Ablation.

[This retracts the article DOI: 10.1155/2021/5667364.].

Retracted: A Comprehensive Review on Metabolic Syndrome.

[This retracts the article DOI: 10.1155/2014/943162.].

Retracted: Coronary Angiography Safety between Transradial and Transfemoral Access.

[This retracts the article DOI: 10.1155/2016/4013843.].

Retracted: Subclinical Hypothyroidism and Its Association with Increased Cardiovascular Mortality.

[This retracts the article DOI: 10.1155/2017/7539735.].