Heart Strike

''"Your heartbeat is music to my ears." - Prince Taldaram''

Heart Strike is the primary ability of Blood Death knights. It strikes an enemy target as well as up to two of the target's allies.

Theorycraft
In contrast to the ingame help Heart Strike is presumed not to do a real 60% weapon damage with some additional damage. According to some small ranged tests Heart Strike does some kind of a normalized weapon damage, treating all two-handed weapons as if they had an attack speed of 3.2.

The formula for calculating a Heart Strike's non critical damage to a target with no armor will look like: [damage done to target] = ((([weapon-DPS] + [DPS gained by AP]) * 3.2 * 50%)) + [X dmg based on rank (at lvl 80 it's 368)]) + [10% per number of diseases on target]

The factor '3.2' is the speed normalization factor, which leads to a weapon's speed independent heart strike damage. The in-game help supposes, that the real weapon speed should be calculated here instead of this speed normalization factor.