Holter ECG Market Forecast to 2028 - COVID-19 Impact and Global Analysis by Component (Products, Software & Solutions, Services, and Accessories), Application (Diagnostics and Monitoring), Indication (Atrial Fibrillation (AF), Cardiac Arrest, Patients with Pacemakers, and Others), Channel (3 Channel ECG System, 5,6 & 7 Channel ECG System, 12 Channel ECG System, and Others)