[Chronotropic insufficiency in patients with ischemic heart disease].

A study is presented of 80 patients with ischemic heart disease (IHD): 37 patients with a low reaction of the cardiac rhythm to physical load--chronotropic insufficiency (CHI) and 43 patients with an adequate reaction of the cardiac rhythm to loads. Physical working capacity was evaluated by the strength of threshold load, pulsepressure double product, rest quotient, oxygen pulse, oxygen consumption per 1 kgm of work. Interval between the 1 and 2 examination--6.5 years. It was shown that CHI in IHD does not influence the prognosis of the disease and does not reflect the grade of its severity. They are, however, the marker of involvement of the atria. Chronic insufficiency in ischemic heart disease makes it difficult to objectively evaluate the physical working capacity.