Interpretation of electrocardiograms and results of daily ECG Holter monitoring in patients with an implanted cardiac contractility modulator

Cardiac contractility modulation (CCM) is a method of non-drug treatment of chronic heart failure (CHF) in patients with no indications for resynchronization therapy. Now, a detailed study of this method and its capabilities is ongoing, and the indications for its use are expanding. As with any other implantable device, it is important to be able to monitor the operation of the CCM, identify its dysfunction and promptly refer patients to specialized institutions. Assessment of the function of CCM- therapy can be carrying out by recording a standard 12‑channel electrocardiogram (ECG), as well as 24‑hour Holter ECG monitoring (HM-ECG). The mechanism of action of CCM-therapy is fundamentally different from that of other implantable devices. Knowledge of the features of the manifestation of CCM-therapy during instrumental studies is necessary for their correct interpretation.