Pediatric Cardiology Emergencies
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Transcript of Pediatric Cardiology Emergencies
Pediatric Cardiology Emergencies
Esmail Redha,MD,FAAP
Consultant Pediatric Cardiologist
Age specific Emergencies:
Newborn Emergencies
Infant & Childhood Emergencies
Newborn Problems
Cyanosis
Low Cardiac Output
Newborn Problems - Cyanosis
Cardiac CyanosisDoes not respond to oxygenDoes not respond to ventilationUsually no respiratory distress
Newborn Problems - Cyanosis
EvaluationChest x-rayArterial blood gasses(Hyperoxytest)Echocardiogram : Obstructive
Lesion/Abnormal Circulation
Newborn Problems - Cyanosis
Right sided obstructive lesionsPulmonary atresiaTricuspid atresiaTetralogy of Fallot
Tricuspid Atresia
Newborn Problems - Cyanosis
Abnormal CirculationsTransposition of the great arteriesTotal anomalous pulmonary venous
return
Transposition of the Great Arteries
TAPVR
Newborn Problems - Cyanosis
TreatmentPGE1Restoration of acid/base balanceSurgical Evaluation
Newborn Problems - Cyanosis
PGE10.05-0.1 mcg/kg/min starting doseAny intravenous site
UACUVCPeripheral
Interosseous
Newborn Problems: Low Cardiac Output
ShockMetabolic acidosisCirculatory shutdown
Newborn Problems Low Cardiac Output
EvaluationChest x-rayArterial blood gassesEchocardiogramElectrocardiogram
Newborn Problems Low Cardiac Output
Left Sided Obstructive lesionsHypoplastic left heartCritical aortic stenosisCritical coarctation of the aorta
Hypoplastic Left Heart
Severe Coarctation
Without a PDA there is no blood flow to the abdomen
and lower extremities.
(Blue blood is better than no blood.)
Ductal-DependentLesion
Newborn Problems: Low Cardiac Output
Muscle diseasesMyocarditisCardiomyopathiesSepsisAsphyxia
Newborn Problems :Low Cardiac Output
Heart Rate ProblemsSupraventricular tachycardiasComplete heart block
Newborn Problems Low Cardiac Output
Supraventricular TachycardiaNarrow ComplexHeart Rate > 220 bpmUsually > 240 bpm
Narrow Complex Tachycardia
Newborn Problems Low Cardiac Output
Complete Heart BlockHeart rate below 60 bpmNo relationship between P waves and
QRS’s
Complete Heart Block
Newborn Problems
TreatmentLeft heart obstructive lesionsMuscle diseasesHeart rate problemsPGE1 Inotropic support , afterload reduction &
Diuretics.Slow down or speed up
Infant and Childhood Problems:
Hypercyanotic spells
Congestive heart failure
Arrhythmias
Infant and Childhood Problems
Hypercyanotic Spells
Tetralogy of FallotPulmonary Atresia
Tetralogy of Fallot
Infant and Childhood Problems
Hypercyanotic Spells
Sudden decrease in pulmonary blood flow, usually in the morning
Provocation
Raised apex
Hypercyanotic Spells
TreatmentCalmingOxygenMorphinePositioningBeta BlockerPhenylepherine
Hypercyanotic Spells
Phenylepherine
Increase systemic vascular resistance which leads to less R - > L shunting and improved saturation
Hypercyanotic Spells
Long Term Treatment with Propranolol
Indication for surgery, either palliative shunt or total repair
Congestive Heart Failure
Differing etiology at different ages
Congestive Heart Failure
Presentation in InfancyStructural Diseases: Left Heart Obstructions
First days: Hypoplastic Left Heart Syndrome Critical aortic stenosis
First month: Coarctation of the aortaFirst 2 months: Left-to-right Shunts
VSD, PDA, Truncus Arteriosus
Congestive Heart Failure
Presentation after infancyProgression of structural heart diseaseArrhythmias Infectious diseasesLater onset myopathiesToxins:
AnthracyclinesDiphtheria
Congestive Heart Failure
Pre-load
Afterload
Contractility Heart RateDeterminants of Cardiac Output
Heart FailureHeart Failure
Sympathetic ToneSympathetic Tone
Renin & Renin & angiotensionangiotension
Arterial & Arterial & venous venous
constrictionconstriction++HR & coronary HR & coronary
vasoconstrictionvasoconstriction
Ventricular preload Ventricular preload & afterload& afterload
Myocardial Myocardial blood flowblood flow
Worsening heart failureWorsening heart failure
CHF Management
Sites of action of drugs used to treat heart failure:
Congestive Heart Failure
Preload reduction
DiureticsFluid RestrictionHigh caloric density
Congestive Heart Failure
Afterload reduction
ACE inhibitors
Nitroprusside
Congestive Heart Failure
Heart Rate modification
Beta Blockers(eg.:Carvedilol)Also treats diastolic dysfunction & remodeling
Contractility
Acute TreatmentBeta Agonists
Dobutamine Afterload reduction also
EpinepherineDopamine Increased myocardial demandsMilrinone(makes wonders)
Contractility
Milrinone increases contractility and reduces afterload without increasing myocardial oxygen demand
Contractility
Chronic TreatmentDigoxinNew Treatments: Biventricular Pacing,
Assist Device.
Arrhythmias
Narrow Complex Tachycardias
Arrhythmias
Supraventricular Tachycardia
Arrhythmias
Re-entrant TachycardiasAV node re-entryWolff-Parkinson-White
Wolff-Parkinson White
Wolff-Parkinson White S (WPW)
1. Short PR interval. 2. Delta wave (initial slurring of the
QRS complex).3. Wide QRS duration.
Arrhythmias
TreatmentPre-hospitalization
Diving reflex Ice Bag to the face
ValsalvaCarotid Massage(no longer recommended)
Arrhythmias
HospitalizationAdenosine
Diagnostic and therapeutic
Arrhythmias
Adenosine100 mcg/kg IV rapid pushRepeat every 5 minutes with increasing
doses
Arrhythmias
Shock requires ShockSynchronized cardioversion1 joule/kg
Arrhythmias
Digoxin Loading
Beta Blocker
Calcium Channel Blocker(not indicated in infants).
Felcainide
Amiodarone
Procainamide loading
Repeat adenosine
Image 3
Wide QRS Tachycardia
Ventricular arrhythmiasCommon cause of sudden death in repaired congenital heart disease and acquired pediatric heart disease and cardiomyopathy0.001% annual risk in general pediatric
population1-3% annual risk in many repaired CHD4-6% risk in HCM25-30% risk in dilated cardiomyopathy
Final common pathway for cardiac arrest in many conditions
From From Cardiac Arrhythmias in Children and Young Adults with Cardiac Arrhythmias in Children and Young Adults with Congenital Heart Disease.Congenital Heart Disease. Walsh, et al. (2001) Walsh, et al. (2001).
Remember: Prolonged QT
interval
This pt.C/O recurrent fainting attacks
Ventricular tachycardiaDifferential diagnosisVentricular tachycardiaSupraventricular rhythm with aberrant conduction
Rate relatedPermanent bundle branch block
Preexcited rhythmSupraventricular rhythm with preexcitationAntidromic tachycardiaTwo-pathway tachycardia
Paced rhythm
Treatment depends on appropriate diagnosis!
Wide Complex Tachycardias
Treat all as if Ventricular Tachycardia
Wide Complex Tachycardias
Unstable rhythm requires Cardioversion 2 joules/kg(shock requires shock).
Image 4
Ventricular Fibrillation
Ventricular tachycardiaTreatmentAddress treatable causes
ElectrolytesAcidosis
PharmacotherapyClass Ib – lidocaineClass III – amiodarone
Electrical therapyCardioversion Implantable defibrillator
Wide Complex Tachycardias
Surgical TherapyAutomatic Implantable Cardioverter-
Defibrillator
Remember:
1- Sinus tachycardia
2- Supraventricular tachycardia
3- Ventricular tachycardia
4- Atrial flutter
5- Atrial fibrillation
Ventricular fibrillation
‘nuff said
Automated External Defibrilator
Step I
Step II
Step III
Step IV
Step VI
Messages to Take
Neonatal Screening: Upper & Lower Extremities O2 Sat. check.
Don’t Panic with Arrhythmias: Shock when in Shock.
Introduce Autamated External Defibrilator.
You are more blessed than the million who will not survive this week.
You are more blessed than the million who will not survive this week.
I f you woke up this morning with more health than illness ...I f you woke up this morning with more health than illness ...
THANK YOU