A method and apparatus for treatment of hypertension by electric stimulation of coronary artery baroreceptors wherein stimulation electrodes are implanted in the left coronary artery, periarterialy or in an adjacent coronary vein. Stimulation is non excitatory and does not cause heart contractions. Stimulation can be applied during the ventricular refractory period resulting in baroreceptor activation and subsequent reduction of blood pressure. An implantable device monitors ECG and applies to a field of stimulation of baroreceptors.