Cardiology #5 (Pediatric Cardiology) Flashcards
What is the MC innocent (physiologic) murmur?
Still Murmur
What is the pathophysiology of a still murmur?
Thought to be due to vibration of the valve leaflets
Explain a still murmur
Musical, vibratory noisy, twanging, low-pitched early to mid-systolic ejection murmur that is best heart in the inferior aspect of the left lower sternal border and apex
When does a still murmur present?
MC heard from 2 months to preadolescence
What is a patent foramen ovale?
Covered but not sealed open communication between the right and left atria
Even though most patients with a patent foramen ovale are asymptomatic, what are some symptoms they MAY have?
Strokes from paradoxical embolism (stroke with no other underlying cause AKA cryptogenic stroke)
Best test to diagnose patent foramen ovale
Echocardiogram
What should be done for a patent foramen ovale?
- Percutaneous device closure surgically
- If the patient has cryptogenic strokes, give antiplatelet or anticoagulants
What is an atrial septal defect?
Abnormal opening in the atrial septum between the right and left atrium
MC type of atrial septal defect
Ostium secundum
What are some symptoms in infants and young adults with an ASD?
- Recurrent respiratory infection
- Failure to thrive
- Exertional dyspnea
- Easy fatiguability
- Syncope
- Heart Failure
However, in young adults, like patent Foramen ovale, patients with an ASD may have?
Paradoxical emboli (stroke from venous clots) later in life
Explain the murmur of a patient with ASD
- Systolic ejection crescendo-decrescendo flow murmur at the pulmonic area (LUSB)
- Wide, fixed split S2 that does not vary with inspiration
Best test to make diagnosis of ASD
Echo
However, what diagnostic is the gold standard/definitive for ASD?
Cardiac catheterization
Management for an ASD
Small (< 5mm): may be observed. Most close spontaneously in first year of life
If > 1 cm or symptomatic, percutaneous trans catheter closure between 2-4 years old
What is a patent ductus arteriosus?
Persistent communication between the descending thoracic aorta and the main pulmonary artery after birth
What are some risk factors for PDA?
Prematurity
Females
Fetal hypoxia
Explain the pathophysiology of a PDA
-Continued prostaglandin E1 production and low arterial oxygen content promotes patency
Symptoms of a patient with a PDA
-Most asymptomatic
-Poor feeding
-Wide pulse pressures (bounding peripheral pulses)
-loud S2
Frequent lower respiratory tract infections
Explain the murmur of PDA
Continuous machine-like murmur loudest at pulmonic area (LUSB)
Best initial test for PDA
Echocardiogram