Essential Heart Sounds

Fixed Splitting of Second Heart Sound

This lesson covers fixed splitting of the second heart sound. The separation of the two components of the second heart sound remains constant during both inspiration and expiration. In this recording, the splitting is sixty milliseconds. Fixed splitting of the second heart sound (along with murmurs) indicates the presence of an atrial septal defect. This is a congenital heart defect wherein the intra-atrial septum is incompletely formed, resulting in a hole between the left and right atria. In this simulated heart sound, we have eliminated the murmurs so that you can concentrate on the fixed splitting of the second heart sound.

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Introduction

	1	Normal First and Second Heart Sounds - No Splitting
	2	Reduced Intensity First and Second Heart Sounds
	3	Split Second Heart Sound
	4	Third Heart Sound (S3) Gallop
	5	Fourth Heart Sound (S4) Gallop
	6	Third and Fourth Heart Sound Gallop
	7	Summation Gallop at 120 beats per minute
	8	Fixed Splitting of Second Heart Sound
	9	Mid-Systolic Click
	10	Systolic Murmur - Aortic Stenosis
	11	Diastolic Murmur - Aortic Regurgitation
	12	Mitral Valve Leaflet Prolapse
	13	Pansystolic Murmur - Mitral Regurgitation
	14	Diastolic Murmur - Mitral Stenosis

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Essential Heart Sounds

Fixed Splitting of Second Heart Sound

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