| accentuation | Act of accentuating; applications of accent. Specifically . Pitch or modulation of the voice in reciting portions of the liturgy. Origin: LL. Accentuatio: cf. F. Accentuation. Source: Websters Dictionary (01 Mar 1998) |
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| presystolic | <physiology> Preceding the systole or contraction of the heart; as, the presystolic friction sound. Source: Websters Dictionary (01 Mar 1998) |
| presystolic gallop | Gallop rhythm in which the gallop sound follows atrial systole in late diastole and is an audible fourth heart sound due to forceful ventricular filling. Synonym: atrial gallop. Protodiastolic gallop, gallop rhythm in which the gallop sound occurs in early diastole and is an abnormal third heart sound. (05 Mar 2000) |
| presystolic murmur | A murmur heard at the end of ventricular diastole (during atrial systole if in sinus rhythm), usually due to obstruction at one of the atrioventricular orifices. Synonym: atriosystolic murmur, late diastolic murmur. (05 Mar 2000) |
| presystolic thrill | A thrill immediately preceding the ventricular contraction, that is sometimes felt on palpation over the apex of the heart. (05 Mar 2000) |