| ESD | electronic summation device; electrostatic discharge; emission spectrometric device; end-systolic di... |
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| S | Greek capital letter sigma; syphilis; summation of series |
| Sp | the most posterior point on the posterior contour of the sella turcica; species; specific; specimen;... |
| ADG | ambulatory diagnostic group; atrial diastolic gallop; axiodistogingival |
| AG | abdominal girth; agarose; aminoglutethimide; analytical grade; anion gap; antigen; antiglobulin; ant... |
| summation gallop | Gallop rhythm in which the gallop sound is due to superimposition of third and fourth heart sounds; sometimes heard in normal subjects with tachycardia, but usually indicative of myocardial disease. Synonym: S7 gallop, S7. Systolic gallop, obsolete term for a triple cadence to the heart sounds in which the extra sound occurs during systole, usually in the form of a systolic "click." (05 Mar 2000) |
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| summation | The act of summing, or forming a sum, or total amount; also, an aggregate. "Of this series no summation is possible to a finite intellect." (De Quincey) Origin: Cf. F. Sommation. See Sum. Source: Websters Dictionary (01 Mar 1998) |
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| summation beat | A beat triggered by more than a single electrical impulse, when the wave fronts coincide to act together on a single final pathway of activity; in the electrocardiogram, the atrial or ventricular complex when either atria or ventricles are activated jointly by two simultaneous or nearly simultaneous invading impulses. Synonym: combination beat, mixed beat, summation beat. (05 Mar 2000) |
| summation of stimuli | Cumulative muscular or neural effects produced by the frequent repetition of stimuli. (05 Mar 2000) |
| atrial 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) |
| gallop | A triple cadence to the heart sounds; due to an abnormal third or fourth heart sound being heard in addition to the first and second sounds, and usually indicative of serious disease. Synonym: bruit de galop, cantering rhythm, gallop rhythm, Traube's bruit. (05 Mar 2000) |
| gallop rhythm | Heart rhythm like the gallop of a horse. (12 Dec 1998) |
| gallop sound | The abnormal third or fourth heart sound which, when added to the first and second sound's, produces the triple cadence of gallop rhythm. See: gallop. (05 Mar 2000) |
| s3 gallop | <clinical sign> A finding which can be heard on auscultation of the heart in the setting of congestive heart failure. The sound of the S3 gallop, which immediately follows the second heart sound (S2) is thought to be produced by the sound of blood flowing into a noncompliant ventricle. This may occur in the setting of CHF and is best appreciated at the left ventricular apex. (17 Dec 1997) |
| s4 gallop | <clinical sign> A presystolic atrial sound that immediately precedes the first heart sound (S1). This finding on auscultation of the heart may indicate myocardial disease. It is also found in those with hypertension. (17 Dec 1997) |
| S7 gallop | Gallop rhythm in which the gallop sound is due to superimposition of third and fourth heart sounds; sometimes heard in normal subjects with tachycardia, but usually indicative of myocardial disease. Synonym: S7 gallop, S7. Systolic gallop, obsolete term for a triple cadence to the heart sounds in which the extra sound occurs during systole, usually in the form of a systolic "click." (05 Mar 2000) |
| 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) |
| systolic gallop rhythm | An obsolete term for extra sounds, usually clicks, heard during systole. (05 Mar 2000) |
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