Dmitry Dmitriyevich Pletnyov (Russian: Дми́трий Дми́триевич Плетнёв; 1871 or 1872, Moskovsky Bobrik village, Kharkov guberniya — 11 September 1941, Medvedev forest near Oryol) was a Russian doctor, medical scientist and publicist. He defended his dissertation on cardiac arrythmias in 1906. He was a member of the liberal Kadet party. He worked in the Moscow University and since 1929 led the therapeutic clinic of the Moscow oblast clinical institute. 1933–1937 he led the research institute of functional diagnostics and experimental therapy. His patients included Lenin, Nadezhda Krupskaya, Ivan Pavlov and other party and state leaders/figures of the USSR. Pletnyov is one of the founders of Russian cardiology. He often visited Western Europe and worked in the best clinics of Germany, Switzerla