cardiograph articles
Who is credited with inventing the electrocardiogram machine around 1903?
In what approximate year was Willem Einthoven's initial electrocardiogram machine first developed?
What sensitive instruments characterized the initial working iteration of the ECG principle?
What was required to immerse the early string galvanometers for stable readings?
Approximately how much weight could the original, stationary ECG setup weigh?
What early concept involved transmitting ECG signals remotely before ambulatory monitoring?
Which physician is famously associated with inventing the Holter monitor in the 1950s?
How long was the Holter monitor typically designed to record heart activity continuously?
What conceptual shift defines the transition from Holter monitoring to modern portable ECGs?