NOT. There are many disease factors that can cause acute chest pain, which broadly include intra-thoracic structural lesions, chest wall tissue disease, subdiaphragmatic organ lesions and functional disease. Among them, intrathoracic structural lesions can include cardiogenic chest pain and non-cardiogenic chest pain, and respiratory chest pain is a non-cardiogenic element of intrathoracic structural lesions. Breathing chest pain is therefore not cardiac chest pain.