The investigators will collect plasma and cardiac tissue specimens from consenting subjects. The investigators will evaluate the expression of mRNAs, miRNAs and lncRNAs in patients affected by both end-stage and not end-stage HF as well as in patients affected by aortic stenosis and undergoing valve replacement and requiring cardiac myectomy. The tissue dysregulated RNAs will be next measured in plasma samples in order to clarify their potential as biomarkers.