Physicians Desk Reference Physicians Desk Reference
Browsable database of medical products, manufacturer, therapeutic categories, indication, contra indication, side effects, drug and food interaction.
Medical Product | Medical Manufacturer | Therapheutic | Indication | Contra Indication | Side Effect | Drug Interaction | Food Interaction

knock

knock (nok)

1. Colloquialism for a blow, especially a blow to the head. 2. A sound simulating that of a blow or rap.
pericardial k. an early diastolic sound analogous to the normal third heart sound, but occurring somewhat earlier, due to rapid ventricular filling being abruptly halted by the restricting pericardium; a truly "knocking" quality is uncommon.

 

Browse Medical References:

[A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M]
[N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z]