Theory 05/Cardiac cycle/Progression phase
Progression Is Conduction Velocity
The claim
The duration of ventricular activation is set by conduction velocity relative to path length, so a dilated heart activates more slowly.
01Mechanism
The wavefront must traverse the myocardium; velocity and distance determine timing.
02Prediction
Activation time should track the ratio.
03Refutation
Timing tracking heart size alone would remove velocity.