Bonjour,
Oui, que ce soit des blessures de combat ou non n'importe pas, des blessures issues d'une source avec le contact mortel infligées à une créature entrainent sa destruction :
702.2c A creature with toughness greater than 0 that’s been dealt damage by a source with deathtouch since the last time state-based actions were checked is destroyed as a state-based action. See rule 704.
Et idem pour le lien de vie :
702.13b Damage dealt by a source with lifelink causes that source’s controller, or its owner if it has no controller, to gain that much life (in addition to any other results that damage causes). See rule 119.3.