Multimedia textbook (images, text and animations) by Stig S Lundbäck.
E-textbook by University of Iowa College of Medicine
A cardiology handbook for revision by the MCCQE. Useful for medical students preparing for USMLE and Canadian board exam.
Learn ECG in interactive way by Dr. Alan Lindsay:
Topol: Textbook of Cardiovascular Medicine Eric J. Topol M.D
Requires registration to access Merck Medicus website.
By Galen S. Wagner M.D. Covers in detail of every aspect of electrocardiography. Requires registration to access Merck Medicus website.
By Barry L. Zaret, M.D., Marvin Moser, M.D., Lawrence S. Cohen, M.D.
Requires free registration for access. Covers topics of hypertension, heart failure, cardiac ischemia and atherosclerosis. By Eugene Braunwald
Cardiology Glossary (Yale University School of Medicine)
Evidence based cardiovascular medicine Guidelines by American college of cardiology .You can also download guidelines in PDF.
Excellent concise notes