The most fundamental distinction is between systolic ejection murmurs and pansystolic murmurs. 最基本是要分清收縮期噴射音和全收縮期雜音。
A diastolic murmur may indicate aortic regurgitation from aortic dissection involving the aortic root. 舒張期雜音表明因主動(dòng)脈破裂而引起的主動(dòng)脈返流,累及主動(dòng)脈根部。