The unique biology of cardiac fibroblasts and related cells, such as cardiac myofibroblasts and valvular interstitial cells, distinguish them from other fibroblastic cells, a concept that is only beginning to be widely appreciated. Further, the natural signals that stimulate and inhibit cardiac fibrosis within these cells are not well understood. This volume compiles articles that address the molecular mechanisms that control the synthesis and secretion of the cardiac ECM. The book showcases chapters that highlight discussion of role of Transforming Growth Factor β (TGFβ), an important fibrogenic cytokine and its downstream effectors SMAD in many cardiac diseases. Further, the contributions highlight information to discuss endogenous inhibitors of cardiac fibrosis, as well as advances in tissue engineering specific to matrix in the heart. Finally, discussions of unifying mechanisms of matrix remodeling in valves and myocardium are presented.