This is the 4204th most frequent Arabic word.
قلبية
"قلبية" means "cardiac" or "related to the heart."
Here, "قلبية" is used as an adjective relating to the heart, describing the type of attack suffered.
أُصيبَ الرجل بنوبةٍ قلبيةٍ حادةٍ.
The man suffered a severe heart attack.
In this context, "قلبية" is used metaphorically to indicate emotional warmth or sincerity.
كانَ الجو في الحفل يحملُ أجواءً قلبيةً ومليئةً بالمودة.
The atmosphere at the party was heartfelt and full of warmth.
Here, "قلبي" derived from "قلبية", conveys a genuine and sincere emotional support.