Cyclic nucleotide phosphodiesterase with a dual-specificity for the second messengers cAMP and cGMP, which are key regulators of many important physiological process (PubMed:14592490, PubMed:21393242). Regulates angiogenesis by inhibiting the cAMP- dependent guanine nucleotide exchange factor RAPGEF3 and downstream phosphatidylinositol 3-kinase gamma-mediated signaling (PubMed:21393242). Controls cardiac contractility by reducing cAMP concentration in cardiocytes (By similarity). {ECO:0000250|UniProtKB:Q61409, ECO:0000269|PubMed:14592490, ECO:0000269|PubMed:21393242}. This is the function of PDE3B (phosphodiesterase 3B, Ensembl gene identifier ENSG00000152270).