Peds Cardio Flashcards
What Heart Sound is this?
- Respiratory inspiration:
- ↑ blood flow to right heart
- ↑ blood into RV
- Delays emptying of RV
- Prolongs the closure of S2
S2: Pulmonary Component
What abnormal heart sounds are these 5 assocaited?
- Widely Split-Electrical delay (RBBB), VSD repair (TOF)
- Fixed Split- Volume overload (ASD)
- Narrowed Split Pulmonary hypertension (loud S2)
- Paradoxical Split-Electrical delay (LBBB)
- Single Complex heart defect (TGA) or single ventricle defect (only 1 semilunar valve)
Abnormal S2 Sounds
What are the Inspiratory, Expiratory, and Both Sound Splits?
Inspiration: Normal Split, Narrow Split
Expiratory: Paradoxical
Both: Wide and Wide Fixed
What are the Other Adventitious Heart Sounds?
S3 Sound
Best heard at apex
Rapid ventricular filling/volume overload
Pregnancy, MR/TR
Common variant in children
S4 Sound
Low pitch sound in late diastole
Best head at apex
Obstruction, ↓ ventricular compliance
Pathological
Hypertension, cardiomyopathy
Pulmonary stenosis
What does a Friction rub mean?
Pericarditis
What are the 3 innocent Murmurs?
- Still’s murmur
- Venous hum murmur
- Peripheral pulmonary stenosis
What are the 3 Pathologic Murmurs
- Systolic
- Diastolic
- Continuous
How can you Eval Murmurs?
- Timing of cardiac cycle
- Location
- Grade, intensity
- Shape
- Radiation:
Neck > aortic stenosis
Back > pulmonary valve stenosis
Axilla > peripheral pulmonary murmur
- Positional changes
What Murmur grade are thrills present?
4/6 and above
How can you Evaluate Murmurs?
- Standing position: ↑ Hypertrophic cardiomyopathy,↑ Mitral valve prolapse,↓ Aortic stenosis
- Valsalva:↓ Innocent heart murmur, ↑ HCM
- Standing & Valsalva ↓ all murmurs, except… (↓ blood flow to left heart)
What Murmur is this?
- Most common innocent heart murmur
- 3 – 6 years of age
- Normal EKG
- Low frequency, musical, vibratory sound
- LMSB, LLSB, apex
•Loudest in supine position & stress (fevers)
- Changes intensity with sitting position
- Outgrow in adolescent years
- No echocardiogram needed
Still’s Murmur
What Murmur is this?
- AKA cervical hum murmur
- 3 – 6 years of age
- Turbulence due jugular venous drainage
- Continuous murmur (right side > left side)
- Base of the heart
- Diastolic component louder than systolic
- Loudest with upright position
- Decreased with supine or turning neck
- No echocardiogram needed
Venous Hum Murmur
What type of Cyanosis is this?
- Acrocyanosis
- Normal saturations & PaO2
- Normal transitional newborn physiology
Peripheral Cyanosis
What Cyanosis is this?
- Blue lips, tongue
- Low saturations
- Low saturations & PaO2
- Congenital heart defect
Central Cyanosis
What type of Cyanosis is this?
- Benign variant
- Vasospasm of small arterioles
- Normal pulses
- No oxygen desaturations
- No pathological murmur
- Reassurance
Acrocyanosis
What are the 3 Fetal Circulation Shunts?
Ductus venosus
Foramen ovale
Ductus arteriosus
What Shunt is this?
- Post-natal can provide pulmonary of systemic BF
- Functional closes 12-90 hours
- Anatomically closes 2-3 weeks
Patent Ductus Arteriosus
PDA helps Mix blood. What color is the baby?
1) Clue to congenital heart defect, PDA closing
2) Poor prognosis: intracardiac shunt closed, Need PGE to open PDA
3) PDA patency open, Palliation to provide PBF or systemic blood flow, Saturations 75-90%
1) Blue Baby
2) Grey Baby
3) Blue or Purple Baby
What are Congenital Heart Defect Sxs?
Think DNA nucleotides (ATGC)
- Tachypnea: (L-R shunt), CXR: pulmonary edema, cardiomegaly
- Cyanosis: (R-L shunt or obstruction to lungs), “Blue baby” = Cyanosis
- “Grey baby”: (↓ or no systemic blood flow), Poor perfusion, Lactic acidosis
What are the 4 Congenital Heart Defects?
* associations*
1) ASD, VSD, PDA
2) TOF, TGA, TA (X2)
3) PS, COA
4) HLHS
1) Acyanotic Defects
2) Cyanotic Defects
3) Obstructive Defects
4) Complex heart defect/ signle ventricle
What type of CHD?
Usually left-to-right shunt
Considered a “volume load” on the ventricles
The ventricle is carrying additional cardiac output
Volume loading dilates the ventricles (and atria)
No prostaglandins (PGE) are required to treat!
Acyanotic Defects
What are the Left -to- Right Shunting Sxs?
(think low CO)
* Large ASDs may be Asymptomatic*
- Tachypnea
- Poor feeding
- Exercise intolerance
- Poor growth
What type of Septal Defect is this?
- 5-10% of all heart defects (relatively common)
- Can be seen as a part of more complex defects
- Can occur in several locations of the atrial septum
- Up to 25% of US population may have a patent foramen ovale (PFO - This is not and ASD)
RA, RV & PA can become enlarged as a result of _____
Atrial Septal Defect (ASD)
What Septal Defect has these Physical Exam Findings?
- Precordial bulge
- Hyperdynamic precordium
- Auscultation:
- Normal S1
- Fixed split of S2
- Grade 2-3/6 systolic ejection murmur at LUSB
- May hear diastolic “rumble” at RLSB
- Exam is similar to Still’s murmur, but doesn’t change with position
- EKG may have right axis deviation & right ventricular conduction delay
Atrial Septal Defect (ASD)
