Pathology Flashcards
Early cianosis
Right to left shunts. Blue babies
Right to left shunts
5 Ts:
- Truncus arteriosus: 1 vessel
- Transposition: 2 vessels
- Tricuspid atresia: 3= Tri
- Tetralogy of fallot: 4= Tetra
- TAPVR = 5 letters= total anomalous pulmonary venous return
Lack of aorticopulmonary septum formation
Persistent truncus arteriosus
Separation of systemic and pulmonary circulations
Transposition of great vessels
Not compatible with life unless a shunt is present
Transposition of great vessels
Transposition of great vessels prognosis
Without surgical intervention most infants die within first few months of life
Requires both ASD and VSD for viability
Tricuspid atresia
Most common cause of early childhood cyanosis
Tetralogy of fallot
Anteriosuperior displacement of the infundibular septum
Tetralogy of Fallot
Tetralogy of fallot
PROVe
- Pulmonar infundibular stenosis
- Right ventricular hypertrophy: boot-shaped heart
- Overriding aorta
- VSD
Determinant for prognosis in tetralogy of Fallot
Pulmonar infundibular stenosis
Treatment of tetralogy of Fallot
Early surgical correction
Squatting effect over tetralogy of Fallot
it increases systemic vascular resistance, decreasing right to left shunt (lower pressure difference), thus improving cyanosis.
Pulmonary veins drain into right heart circulation
TAPVR: total anomalous pulmonary venous return
TAPVR usually associates
ASD or PDA to allow for right to left shunting to mantain CO
Caused by lithium exposure in utero
Ebstein anomaly
Ebstein anomaly
Displacement of tricuspid valve leaflets downward into RV
Artificially atrializes the ventricle
Tricuspid regugitation + Right Heart Failure
Tet spells
Cyanotic episodes: crying, fever and exercise cause exacerbation of RV outflow obstruction, increasing right to left flow across VSD
Acyanotic presentation, it may occur later
Left to right shunts
Frequency of Left to right shunts
VSD>ASD>PDA
Most common congenital heart defect
Ventricular septal defect
Presentation of VSD
- asymptomatic at birth
- manifests later or remains asymptomatic
- most selfe resolve
- larger lesions lead to LV overload and HF
May lead to paradoxical emboly
ASD
Atrial septal defects are caused by defects in
Ostium secundum: more frequent, isolated
Ostium primum: rare, associate other cardiac anomalies
Continuous machine like murmur
Patent ductus arteriosus
Uncorrected _____ can result in late cyanosis in the lower extremities
Patent ductus arteriosus
Eisenmenger syndrome
Uncorrected left to right shunt: VSD, ASD, PDA
High pulmonary blood flow: pulmonary arterial hypertension: RVHypertrophy to overcompensate: shunt becomes right to left
Causes:
- Late cyanosis
- Clubbing
- Polycitemia
Aortic narrowing near insertion of ductus arteriosus
Coarctation of the aorta
Coarctation of aorta associates
- Bicuspid aortic valve
- Turner syndrome
- Other heart deffects
Notched ribs appearence on CXR
Coarctation of aorta: intercostal arteries enlarge due to collateral circulation: arteries erode ribs
Hypertension in upper extremities and weak, delayed pulse in lower extremities: brachial-femoral delay
Coarctation of aorta
Coarctation of aorta complications
- Heart failure
- Risk of cerebral hemorrhage= berry aneurisms
- Aortic rupture
- Endocarditis
Alcohol exposure in utero leads to
VSD PDA ASD Tetralogy of fallot Left to right + TofF
Congenital rubela leads to
PDA
Pulmonary artery stenosis
Septal defects
Down syndrome heart deffects
AV septal defect: endocardial cushion defect
VSD
ASD
Infant of diabetic mother heart deffect
Transposition of great vessels
Marfan syndrome heart defects
Mitral valve prolapse: hiperlaxitud
Thoracic aortic aneurysm and dissection
Aortic regurgitation
Turner syndrome heart defects
Bicuspid aortic valve
Coarctation of aorta
Williams syndrome heart defects
Supravalvular aortic stenosis
22q11 syndromes heart deffects
Truncus arteriosus
Tetralogy of Fallot
Define hypertension
Persistent systolic BP>140, diastolic BP>90
90% of hypertension is…
Primary=essential
10% of hypertension is due to
Renovascular disease
1º hyperaldosteronism
String of beads in renal artery
Fibromuscular dysplasia
Hypertensive urgency
> 180/120 hypertension WITHOUT acute end organ damge
Hypertensive emergency
Severe hypertension with evidence of acute end organ damage:
- Brain: encephalopathy, stroke
- Eyes: retinal hemorrhages/exudates, papilledema
- Heart: MI/HF, aortic disection
- Kidney: injury, microangiopathic hemolytic anemia
- Eclampsia
Hiperlipidemia signs
- Xanthomas: lipid-laden histiocytes. Eyelids: xanthelasma
- Tendinous xantoma: achilles
- Corneal arcus: common in elderly: arcus senilis
Calcification of internal elastic lamina and media of medium sized arteries
Mönckberg sclerosis: medial calcific sclerosis
Pipestem appearance on xray
Mönckberg sclerosis
Mönckberg sclerosis and blood flow
DOESNT obstruct
Types of arteriolosclerosis
- Hyaline: thickening in essential hypertension or Dm
2. Hyperplasic: onion skinning in severe hypertension
Arteriosclerosis
Hardening of arteries with arterial wall thickening and loss of elasticity
Atherosclerosis
Disease of elastic arteries and large and medium sized muscular arteries: form of arteriosclerosis caused by buildup of cholesterol plaques
Location of atherosclerosis
Abdominal aorta > coronary artery>popliteal artery>carotid artery
Symptoms of atherosclerosis
Angina
Claudication
Progression of atherosclerosis
endothelial cell dysfunction: macrophage and LDL accumulation: foam cell formation: fatty streaks: smooth muscle cell migration: proliferation and exrtacellular matrix deposition: fibrous plaque: complex atheromas
Localised pathological dilation of the aorta
Aortic aneurism
Palpable pulsatile abdominal mass
Abdominal aortic aneurysm
Abdominal aortic aneurysm is associated with
Atherosclerosis
Thoracic aortic aneurysm is associated with
Cystic medial degeneration
Risk factors for thoracic aneurysm
- HTA
- Bicuspid aortic valve
- Connective tissue disease: Marfan
- 3ary syphilis: endarteritis obliterans of vasa vasorum
Most frequent location of traumatic aortic rupture
Aortic isthmus: proximal descending aorta distal to origin of left subclavian artery
Aortic dissection
Longitudinal intimal tear forming a false lumen
Types of aortic dissection
Standford type A: Ascending aorta
Standford type B: Descending aorta
Treatment of Standford type A aortic dissection
Surgery
Treatment of Standford type B aortic dissection
Medically:
- Beta blockers
- Vasodilators
Necrosis in angina
No myocyte necrosis
Chest pain due to ischemic myocardium 2º to coronary artery narrowing or spasm
Angina
Types of Angina
- Stable
- Variant-Prinzmetal
- Unstable
Stable Angina
- 2º to atherosclerosis
- Exertional chest ain in classic distribution
- ST depression on ECG usually
- Resolves with rest or nitroglicerin
Variant Angina
- AT REST
- 2ª to coronary artery spasm
- Transient ST elevation on ECG
Risk factors for Variant Angina
Smoking
HTA and hypercholesterolemia are not
Triggers Variant Angina
Cocaine
Alcohol
Triptans: 5HT1 agonist for migraine
Treatment of Variant Angina
Ca channel blockers
Nitrates
Smoking cessation
Stable angina is secondary to
Atherosclerosis
Unstable angina is secondary to
Thrombosis
Unstable angina
- Secondary to thrombosis with incomplete coronary artery oclusion
- +- ST depression and or T wave inversion
- NO CARDIC biomarker elevation (unlike NSTEMI)
NSTEMI vs Unstable angina
Unstable angina has no cardiac biomarker elevation
Principle behind pharmacologic stress tests with coronary vasodilators
Coronary steal syndrome
- Dipyridamole
- Regadenoson
Coronary steal syndrome
Administration of vasodilators dilates normalvessels and shunts blood towards well perfused areas, diverting flow away from stenosed vessels, leading to ischemia in myocardium perfused by these