Which of the following hea sound may be a normal finding during pregnancy?
Correct Answer: S3
Description: Ans. b. S3Ref Ganong's Review of Medical Physiology 2511' edn; Page no. 542Hea SoundsCauseCharactersSite of auscultationPhonocar- diogramECG correlation51-Vibrations set up by suddenclosure of AV valvesat the sta of ventricular systole, during phaseof isovolumetric contraction. Long & soft LUBB Duration -0.15 sFrequency- 25 - 45 HzBest heard over mitral and tricuspid areaSingle group of 9-13 waves - rescendoand diminuendo series of wavesCoincides with peak of R wave52 - Vibrations with closure ofsemilunar valves ust at the onset of ventricular diastole.Heard as a single sound during expiration but during inspiration the increased output of the right hea causes a physiological splitting. Sho,loud High Pitched DUBB Duration0.12 s Frequency 50 HzBest heard over aoic and pulmonary area Single group of 4-6 waves having same amplitudeCoincides with end of T wave CauseCharactersSite of auscultationPhonocar- diogramECG correlation53 -- Vibrations set up in cardiac wallby inrush of blood during rapid fillingphase of ventricular diastole. It may be heard duringlate pregnancy. In children and young adults, is a normalfinding.Sho, soft Low pitched Duration --0.1 sNormally cannot be heard byauscultation with stethoscope 1-- 4 waves grouped togetherAppears between T and P waves54 -- Vibrations set up during atrialsystole Coincides with last rapid filling phaseof ventricular diastole. Examples include concentrichyperophy, aoic stenosis, and myocardial infarction. Sho, low pitched Duration -- 0.03 sFrequency --3 HzNormally cannot be heard by auscultationwith stethoscope1-2 waves with very low amplitudeCoincides with interval betweenend of P wave and onset of Q wave
Category:
Physiology
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now