Global ECG Machine Market By Product Type (ECG Holter Monitoring System, ECG Resting System, Cardiopulmonary Stress Testing System and ECG Stress Testing System), By Technology (Digital and Analog), By Modality (Wireless and Wired), By End User (Hospitals, Specialty Clinics and Ambulatory Surgical Centers), Region and Companies – Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2026-2035