Fourth Heart Sound | Signs - MedSchool
Sign up to start your free trial of MedSchool Premium!Get Started
 
Signs
 
 
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
R
S
T
U
V
W
X
Z
 

Fourth Heart Sound

Bookmark

Overview

  • The fourth heart sound (S4) is a pathological finding associated with turbulence during atrial systole.
    • Interpretation

    • Listen for a gallop rhythm with an extra heart sound just before S1. Best heard on inspiration.
    • Causes of Fourth Heart Sound

    • Hypertension
    • Aortic stenosis
    • Pulmonary stenosis
    • Mitral regurgitation
    • Hypertrophic cardiomyopathy
    • Acute myocardial infarction
  • Gallop rhythms are so named due to the similarity of their cadence with that of the sound of a horse galloping.
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 
Feedback