Third heart sound
.svg)
| Third heart sound | |
|---|---|
| [[File:|250px|alt=|]] | |
| Synonyms | S3 |
| Pronounce | N/A |
| Field | Cardiology |
| Symptoms | |
| Complications | |
| Onset | |
| Duration | |
| Types | |
| Causes | |
| Risks | |
| Diagnosis | Auscultation |
| Differential diagnosis | |
| Prevention | |
| Treatment | |
| Medication | |
| Prognosis | |
| Frequency | |
| Deaths | |
The third heart sound (S3) is a low-frequency sound that occurs early in diastole during the rapid filling phase of the ventricles. It is often associated with increased volume of blood within the ventricle and can be a normal finding in children and young adults. However, in older adults, it may indicate the presence of heart failure or other cardiac conditions.
Physiology[edit | edit source]
The third heart sound is produced by the rapid deceleration of blood flow into the left ventricle from the left atrium. This sound is best heard with the bell of the stethoscope at the apex of the heart with the patient in the left lateral decubitus position. It is often described as a "dull" or "thudding" sound.
Clinical Significance[edit | edit source]
In young individuals, an S3 can be a normal variant and is often referred to as a "physiological S3." In older adults, an S3 is more likely to be pathological and may indicate conditions such as:
Diagnosis[edit | edit source]
The presence of an S3 can be detected through auscultation during a physical examination. It is important to differentiate an S3 from other heart sounds, such as the fourth heart sound (S4), which occurs just before the first heart sound (S1) and is associated with a stiff or hypertrophic ventricle.
Management[edit | edit source]
The management of a patient with an S3 depends on the underlying cause. If the S3 is due to heart failure, treatment may include:
Related Pages[edit | edit source]
See Also[edit | edit source]
Cardiovascular disease A-Z
Most common cardiac diseases
- Cardiac arrhythmia
- Cardiogenetic disorders
- Cardiomegaly
- Cardiomyopathy
- Cardiopulmonary resuscitation
- Chronic rheumatic heart diseases
- Congenital heart defects
- Heart neoplasia
- Ischemic heart diseases
- Pericardial disorders
- Syndromes affecting the heart
- Valvular heart disease
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z
A[edit source]
- Accelerated idioventricular rhythm
- Acute decompensated heart failure
- Arteriosclerotic heart disease
- Athletic heart syndrome
- Atrial flutter
- Atrioventricular fistula
- Cardiovascular disease in Australia
- Autoimmune heart disease
B[edit source]
C[edit source]
- Ebb Cade
- Cardiac allograft vasculopathy
- Cardiac amyloidosis
- Cardiac asthma
- Cardiac tamponade
- Cardiogenic shock
- Cardiogeriatrics
- Cardiorenal syndrome
- Cardiotoxicity
- Carditis
- Coronary artery aneurysm
- Coronary artery anomaly
- Coronary artery disease
- Spontaneous coronary artery dissection
- Coronary artery ectasia
- Coronary occlusion
- Coronary steal
- Coronary thrombosis
- Coronary vasospasm
- Cœur en sabot
- Coxsackievirus-induced cardiomyopathy
D[edit source]
E[edit source]
H[edit source]
- Heart attack
- Heart failure
- Heart failure with preserved ejection fraction
- Heart to Heart (1949 film)
- High-output heart failure
- Hyperdynamic precordium
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z
I[edit source]
- Idiopathic giant-cell myocarditis
- Interventricular dyssynchrony
- Intraventricular dyssynchrony
- Isolated atrial amyloidosis
K[edit source]
L[edit source]
M[edit source]
- Mydicar
- Myocardial bridge
- Myocardial disarray
- Myocardial rupture
- Myocardial scarring
- Myocardial stunning
- Myocarditis
N[edit source]
O[edit source]
P[edit source]
- Papillary fibroelastoma
- Pathophysiology of heart failure
- Postpericardiotomy syndrome
- Pulmonary vein stenosis
R[edit source]
S[edit source]
- Saturated fat and cardiovascular disease
- SCAR-Fc
- Shone's syndrome
- Strain pattern
- Subacute bacterial endocarditis
- Sudden cardiac death of athletes
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z
T[edit source]
V[edit source]
W[edit source]
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