California EKG expert witnesses interpret electrocardiograms and assess cardiac monitoring standards in clinical care. Many are cardiologists, electrophysiologists, emergency physicians, or critical care clinicians from Kaiser Permanente, UCLA Health, or UC San Diego Health. They address California’s high-volume ED and ambulance ECG workflows. These experts evaluate arrhythmia detection, ischemia interpretation, telemetry oversight, and timeliness of escalation.