[Soul]

dr_ravi thanx for ur reply.
Actually i was looking for molecular mechanisms of cardiac contaction and relaxation....such as how excitation reaches T-tubules, Ca++ enters and triggers release of Ca++ channels in SR--(Ca induced Ca release), which ultimately leads to cardiac contraction.
Again how Ca++ uptake occurs which leads to cardiac relaxation. such as role of SERCA and phospholamban.
Anyways, thanx for ur great effort, its quite helpful for quick revision.