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Flashcards in Pediatric Murmurs Deck (14)
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1

Changes in circulation at birth

Foramen ovale closes

Ductus arteriosus closes—> forms ligamentum arteriosum

Ductus venosus closes —> forms ligamentum venosum

Umbilical vein becomes ligamentum teres

2

In pediatrics, who should receive a complete cardiac exam?

Any child who has a heart murmur

Any child who has historical features suggestive of cardiac disease or abnormal cardiac function

Infants with: feeding intolerance (sweating, head-bobbing), failure to thrive, respiratory symptoms, cyanosis

Older children with: chest pain, syncope, exercise intolerance, ***FAMILY HISTORY OF SUDDEN DEATH IN YOUNG PEOPLE***

3

6 components of documenting a murmur

Grade (1-6, grade 4 = thrill)

Timing (early, middle, late, holosystolic)

Location of highest intensity

Character (harsh, whooping, blowing, etc.)

Changes with position

Radiation

4

What are you checking for on an exam of the precordium?

Increased precordial activity

***THRILL*** — caused by blood flowing from high pressure to lower pressure; must be designated as grade IV murmur and above! — needs cardiology eval

5

The later closing of the tricuspid valve and pulmonic valve can occur during inspiration because of increased filling of the right side of the heart. Split S1 is usually normal (in 40-70% of individuals).

A split S2 with inspiration is normal, but a FIXED SPLIT S2 is indicative of _______________

Atrial septal defect (ASD)


[constant overfilling of the right ventricle due to the left to right shunt with subsequent delayed closure of the pulmonic valve]

6

In VSD, S1 and S2 are obscured, it is called a ______ murmur

Holosystolic

7

A _____ murmur is usually lower pitched, rumbling, and NEVER NORMAL ON ITS OWN

Diastolic

8

The only sound in diastole that does not warrant a referral to cardiology

Venous hum (this is a functional/innocent murmur caused by flow of venous blood from the head and neck into the thorax, heard continuously while the child is sitting and should disappear when pressure is placed on jugular vein, when childs head is turned, when child is supine)

9

Most pathologic murmurs do not change significantly with standing. What is the exception?

Hypertrophic cardiomyopathy — harsh crescendo-decrescendo systolic murmur heard best at the apex and left sternal border

Increases in intensity when patient stands

Increases in intensity with valsalva

[essentially a left ventricular outflow tract obstruction; rare but one of the leading causes of death in athletes; also called idiopathic hypertrophic subaortic stenosis (IHSS)]

10

The 7 S’s of innocent murmurs

Sensitive (changes with position or respiration)

Short duration (not holosystolic)

Single (no associated clicks or gallops)

Small (murmur limited to small area and nonradiating)

Soft (low amplitude)

Sweet (not harsh sounding)

Systolic (occurs during and is limited to systole)

11

What are some PE findings that warrant referral to a cardiologist?

Grade 4 murmur or above
Diastolic murmur
Increased intensity on standing
Symptomatic murmur
Obscured heart sounds
Weak femoral pulses
Clicks
Hyperactive precordium
FamHx of sudden death at young age
Abnormal or extra heart sounds (except S3 in kids)
Predisposing conditions (congenital or prenatal)

12

Innocent murmur best heart at apex of heart and LL sternal border; best heard with bell of stethoscope

Still’s murmur

13

18/10,000 infants are born with Critical Congenital Heart Disease (CCHD); this can be diagnosed in the nursery using O2 saturation.

What lesions do we look for?

Hypoplastic left heart syndrome
Pulmonary atresia
Tetralogy of fallot
Total anomalous venous return
Transposition of great arteries
Tricuspid atresia
Truncus arteriosus

[other critical CHDs — coarctation of aorta, double outlet right ventricle, ebstein anomaly, single ventricle]

14

If you have a patient with _______, get a cardiology referral even if you don’t hear a murmur, because they have a high incidence of ASD. The study of choice is ____________

Trisomy 21; echocardiogram with doppler