The impetus to provide a seventh edition of Cardiac Drug Therapy was generated by the positive comments received from readers worldwide, and from favorable reviews of earlier editions. The seventh edition updates and revises the sixth edition in several respects. In particular, the text includes: Six new chapters that deal with ongoing important controversies regarding the use of several widely used cardiac drugs. Controversies have arisen regarding the use of beta blockers for the treatment of hypertension. The front cover of The Lancet November 4, 2005 highlighted “beta blockers should not remain first choice in the treatment of primary hypertension.”.