CARDIAC DISORDERS Cardiac Abnormalities Maternal Disorders Rubella Infection Systemic Lupus Erythematous (SLE) Diabetes Mellitus Peripheral Pulmonary Stenosis, PDA Complete heart block (anti-Ro and anti-La antibody) Incidence increased overall Chromosomal Abnormality Down Syndrome (T 21) AVSD, VSD Edwards Syndrome (T 18) Complex Patau Syndrome (T 13) Complex Turner Syndrome (45 XO) Aortic Valve Stenosis, CoA Chromosome 22q11.2 Del Aortic arch anomalies, TOF, common arterial trunk Noonan Syndrome (PTPN11 mutation and others) Hypertrophic cardiomyopathy, ASD, PS Symptoms • Cyanosis, especially central • Shortness of Breath • Easy Fatigability & Failure to Thrive • Squatting • Hypoxic spells (TET spell, cyanotic spell) • Syncope • Palpitation • Chest Pain Cyanosis CENTRAL o Cyanotic CHD o Lung Disease o Bluish Discoloration: Lips, Nail beds, Mucosa, Skin PERIPHERAL (acrocyanoisis) o Peripheral Body Part o Vasoconstriction due to cold weather or poor cardiac output Shortness of Breath • Increase pulmonary blood flow • Left to Right shunt • Pulmonary vascular resistance (about 3 Wood units) systemic vascular resistance (25 Wood units) • Engorged lungs vasculature, interstitial edema, the excess fluid in the lungs tissues – barrier for proper gaseous exchange • Composition increase respiratory rate and effort = Respiratory Distress Hypoxic Spell (tet spell, cyanotic spell) • Young infants 2-4 month TOF • Paroxysm of hyperpnea • Irritability and prolonged crying • Increasing cyanosis • Decreased intensity of heart murmur • Severe spell – limpness, convulsions, cerebrovascular accident or death • Children with Tetralogy of Fallot exhibit bluish skin during episodes of crying or feeding = ¨Tet spell¨ • Pathophysiology: Decreased SVR/Increase respiratory RVOT will Increase R-L shunt – hyperpnea Hyperpnea Increase systemic venous return which Increase R-L shunt through VSD Squatting • Tetralogy of Fallot – Before squatting o Reduced pulmonary flow o Increased aortic flow • Tetralogy of Fallot – After squatting o Increased pulmonary flow o Reduced Aortic Flow o Increased venous return(sustained squatting) Palpitation • Abnormal heart rhythm: o Too slow o Too fast o Just irregular Children may complain of chest pain when experiencing arrhythmias. Syncope NEUROLOGICAL/CARDIAC CARDIAC – Significant reduction of cardiac output Arrhythmia: – HR too fast to allow for proper filling of ventricles prior to contraction reduced cardiac output – HR too slow to generate adequate cardiac output Obstruction to blood flow: – LVOT obstruction, severe hypertrophy of the ventricular septum – Obstruction of RVOT, such as with TOF Cardioneurogenic Syncope: Reduced venous return and bradycardia drop in cardiac output Chest Pain CARDIAC REASONS (rarely) • Myocardial infarction (ALCAPA) Coronary arterial wall thickening in Williams Syndrome or Kawasaki Disease (in the majority of these cases chest pain is not verbalized) • Pericarditis • Arrhythmia NON-CARDIAC REASONS • Costochondritis: Viral inflammation of the costochondral joints (usually viral illness) • Musculo-skeletal: due to muscle strain such as with exercies, particularly weight lifting, worsening when using involved muscles • Pleural-pericardial pain: due to inflammation • Skin disease: such as herpes zoster, or other lesions Heart Defects Left-to-right shunts (Breathless) • Ventricular Septal Defect (VSD) 30% • Persistent Arterial Duct (PDA) 12% • Atrial Septal Defect (ASD) 7% Right-to-left shunts (Blue) • Tetralogy of Fallot (TOF) 5% • Transposition of the great arteries (TGA) 5% Common mixing (Breathless and Blue) • Atrioventricular Septal Defect (Complete) (AVSD) 2% Outflow obstruction in a wall child (Asymptomatic with a murmur) • Pulmonary stenosis (PS) 7% • Aortic Stenosis (AS) 5% Outflow obstruction in sick neonate (collapsed with shock) • Coarctation of the aorta (CoA) 5% Heart failure Symptoms • Breathlessness (particularly on feeding or exertion) • Sweating • Poor feeding • Recurrent chest infection Signs • Poor weight gain or ¨Faltering Growth¨ • Tachypnea • Tachycardia • Heart murmur, gallop rhythm • Enlarged Heart • Hepatomegaly • Cool Peripheries Right side Heat Failure • Signs of right heart failure (ankle edema, sacral edema and ascites) are in developed counties, but may be seen with longstanding rheumatic fever or pulmonary hypertension, with tricuspid regurgitation and right atrial dilation Etiology of Hear Failure Neonates – obstructed (duct-dependent) systemic circulation • Hypoplastic left heart syndrome • Critical aortic valve stenosis • Severe coarctation of the aorta • Interruption of the aortic arch Infants(High pulmonary blood flow) • Ventricular Septal Defect • Atrioventricular Septal Defect • Large persistent Ductus Arteriousus Older children and adolescents (right or left heart failure) • Eisenmenger syndrome (right heart failure only) • Rheumatic heart disease • Cardiomyopathy Other Heart Disease • Kawasaki Disease o Mainly in young children, may leave the heart muscle or coronary arteries damaged • Myocarditis – DCM, arrhythmias • Cardiomyopathy o A disease of the heart muscle, caused by a genetic disorder or after an infection. It leads to poor heart function (HCM, RCM, DCM, ARV/D) • Rheumatic Heart Disease o Caused by rheumatic fever, this disease leads to heart muscle and valve damage • Bacterial endocarditis • Pericarditis • Arrhythmias o Abnormal heart rhythm created by a disturbance in the hearts electrical system Kawasaki Disease Small and medium vessel vasculitis - Mnemonic ¨Warm CREAM¨ • Warm = Fever • C = Conjunctivitis • R = Rash - Erythematous • E = Erythema palms and soles – With Swelling • A = Adenopathy, cervical – 1 Unilateral node • M = Mucous Membrane – Dry, red, strawberry tongue Complication: – Coronary artery aneurysm and Myocarditis Physical Examination – Inspection General condition assesment: Happy or cranky, nutritional state, respiratory status (tachypnea, dyspnea), pallor (vasoconstriction from CHD or circulatory shock or severe anemia), sweat on the forehead. • Physical Development • Dysmorphic features • Cyanosis • Edema • Clubbing of Digits • Left-sided chest prominence (precordial bulge) • Visible ventricular impulse Edema • Is not a common feature of CHF in children • Best detected over the sacral region, particularly in infants • Swelling of the head and distended neck veins is noted in patients with Glenn shunt and increased pulmonary vascular resistance Clubbing of Digits • Occurs because of hypoxia (peripheral tissues are most vulnerable to hypoxia, capillaries opening causes swelling of the digits) • Clubbing is seen in other lesions with low oxygen supply such as with lung diseases or chronic anemia Precordial Bulge • With or without actively visible cardiac activity • Caused by chronic cardiac enlargement • Pectus Carinatum (Pigeon Chest) – usually not a result of heart enlargement • Pectus Excavatum (Depression of sternum) may be a cause of pulmonary systolic murmur Visible Ventricular Impulse • RV Impulse Under the Xiphisternum • LV Impulse (apex beat) Frequently visible in children Hyperdynamic circulation (fever or excitement) LV enlargement Physical Examination - Palpation • Precordium palpation • Peripheral perfusion • Femoral and brachial arterial pulses • Peripheral pulses • Hepatomegaly • A palpable thrill Precordium Palpation • RV enlargement – fingertips placed between 2nd and 3rd – 4th ribs along the left sternal edge – Abnormal palpation of RV is called a tap or a lift. • The apex beat – 4th intercostal space infants, 4th – 5th schoolchild midclavicular line – LV hypertrophy – diffuse, forceful and displaced apex beat – the feeling is described as a heave. • If the apical beat is difficult to ascertain, ask the child to roll over onto their left side and breath out Peripheral Perfusion • Capillary refill time • Normally is 1-2 seconds in duration • Prolonged indicates poor cardiac output • A brisk capillary refill is seen, despite poor cardiac output in cases where the peripheral vasculature are forced to vasodilate such as with sepsis or the use of pharmacologic agents Pulses (Examination) • The rate (Value ex. Rheumatic fever: Fixed tachycardia, loss of sinus arrhythmia) • Irregularities (Arrhythmias) o Sinus arrhythmia increase on inspiration, slowing on expiration • Volume • Localization: o Radial, brachial and femoral arteries o Use finger pulps o Femoral often difficult to palpate (If diminished check radio-/brachio-/femoral delay) o Palpation of the dorsalis pedis pulse excludes coarctation in infancy Femoral and Brachial arterial pulse • Should be felt simultaneously to assess their strength and timing • CoA femoral is weaker and delayed in timing when compared to the brachial arterial pulse • It is important when doing this assessment to use the right brachial arterial pulse, as the left subclavian may be involved or distal in its origin to the coarctation and will therefore be as weak as the femoral arterial pulse Peripheral pulse • Give a sense of the cardiac output, systolic and diastolic pressures • Poor cardiac output result in low systolic and high diastolic blood pressure = narrow pulse pressure • Low diastolic BP, such as with PDA or aortic regurgitation will cause = wide pulse pressure Pulse Paradoxus – change in pulse volume with respiration CARDIAC TAMPONADE Palpable Thrill A palpable thrill over the precordium or suprasternal notch indicates significant murmur. • Location • ULSB – PS • URSB – AS • LLSB – VSD • Suprasternal notch – AS, occasionally PS, PDA or COA • Over the carotid arteries – AS or COA Physical Examination - Auscultation • Sounds first, murmurs second • Try to ensure the child is not crying • Use both diaphragm and Bell • Listen to the child in lying and sitting position • Note any variation with respiration Auscultation - Sounds First • First heart sound (S1): o Best heard at the apex with bell closure of atrio-ventricular valves • Second heart sound (S2): o Best heard at the base with the diaphragm, usually split in children – widens on inspiration • A2: o Closure of aortic valve • P2: o Closure of pulmonary valve • Added sounds: o Gallop rhythm: (S3, 34) Auscultation - Murmurs second • Problems o Hearing them at all o Distinguishing between significant and innocent • Hints o Majority is systolic until proven otherwise o Try to wipe out all extraneous noise and listen between S1 and S2 using both diaphragm and bell Murmur mnemonic • Grade 1: Barely audible • Grade 2: Soft, variable, innocent usually • Grade 3: Easy to hear, intermediate, no thrill • Grade 4: Loud, audible to anybody, thrill • Grade 5: Sound like a train, very significant, thrill • Grade 6: Scarcely required a stethoscope, thrill Innocent murmurs (physiological, flow murmur) • 30-50% (80%) • High output state o Increased fever • Mnemonic: 4xS • S = aSymptomatic • S = Soft • S = Left Sternal Edge • S = Systolic only Systolic murmur • Holosystolic murmur: o Indicate shunting of blood between two structures in which the pressure in one structure is higher than the other throughout systole o Example: Harsh: VSD Soft: Atrio-ventricular valve regurgitation • Ejection systolic murmur: o Increase in blood flow turbulence as systole progresses due to an increasing amount of blood flow through a restricted orifice o Example Aortic stenosis Pulmonary stenosis Small VSD • Mid-systolic murmur: o Increase volume of blood flowing through normal valve o ASD o Anemia Diastolic Murmur • Early diastolic murmur: o Regurgitate blood flow from aorta or pulmonary artery into the ventricles Aortic insufficiency Pulmonary insufficiency • Late diastolic murmur: o Austin Flint murmur o Aortic regurgitation blood flow causes vibration of left ventricular free wall • Systolic and diastolic murmur: o Pressure difference between two structures during systole and diastole PDA Shunts and collaterals AS and Al Blood Pressure • Patience, practice and selection of cuffs • Right arm • Seated or standing • Size – inner bladder encircles arm, width – 40-50% of the circumference of the arm or leg • Doppler ultrasound recording – neonates and infants • Sphygmomanometer – older children • Arm – heart – sphygmomanometer on the same horizontal plane Normal blood pressure Age Systolic BP Diastolic BP Upper limit (+2SD) Neonates 60 - 70 40 90/52 1 – 4 year 90 62 110/80 6 year 100 66 120/82 10 year 110 70 130/88 14 year 120 74 140/92 Mnemonic hints: • SBP at the age of 6 year 100 mmHg – than 2,5 mm/year thereafter DBP 60 + age in years