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AN UNUSUAL COMPLICATION OF PNEUMONIA
by Karthikeyan.S Prof P.Vijayaraghavan’s Unit
5/6/10 Mr.Kanagaraj , 23/M, came to the opd with
c/o -
fever - 7 days
cough with expectoration - 5 days
breathlessness - 3 days
HOPI-
• fever – high grade,continuous , associated with chills and rigors • cough with expectoration - sputum, moderate amount yellow coloured not blood stained not foul smelling
•Breathlessness – at rest,grade 4,agg.by exertion, not relieved by rest, no PND/Orthopnea
•chest pain – left sided,lower chest wall, pricking type,agg. by inspiration
•No c/o palpitations,syncope
•No c/o urine output,abdominal distension/pain leg swelling
• No c/o jaundice
•No c/o head ache,blurring of vision, altered sensorium,involuntary movements
•No c/o vomitting,diarrhea
•No c/o joint swelling,rashes
•No c/o loss of weight/but loss of appetite+
•Past History –
No c/o similar illness in the past No h/o HT, DM,TB,ASTHMA,RHD
•Personal History- Not a smoker,alcoholic Mixed diet No h/o exposure to CSW
•Contact History-
No history of contact with TB
General examination-
Conscious, oriented, No pallor/icterus No cyanosis/clubbing No generalised lymphadenopathy moderately dehydration+ Dyspneic Febrile, Temp-101 F JVP elevated
Vitals- Pulse- 120/min, regular, nomal volume
B.P- 100/70 mm Hg
System examination:
CVS – S1S2 normally heard,
no murmur
RS – BAE,
Over left mammary,axillary,infra-axillary, lower interscapular and infra-scapular areas- Crepitations+
VF/VR
Bronchial breathing-tubular
Egophony+
ABDOMEN: soft, no organomegaly
CNS: No focal neurological deficit
Provisional Diagnosis
Left lower lobe Pneumonitis with ?Myocarditis
ECG:
ECG:
Provisional diagnosis
PERICARDIAL EFFUSION WITH ?MILD/LOW PRESSURE CARDIAC
TAMPONADE
ECHO:Dense echogenic shadow in pericardial cavity
Normal chambers and valves
? Effusive pericarditis with pyopericardium
SUGGESTED: Emergency pericardial window
Baseline Investigations:CBC: RFT: Hb: 12 g B.UREA:20
mg/dl TC: 13,500 Sr.Creatinine:1
mg/dl DC: P75 L24E1 Sr.Electrolytes
ESR: 20/40mm Na - 138 Plt: 1.2 lakhs K - 4.1 PCV:36% Urine analysis: albumin –nil sugar-nil
deposits- 1-2 pus cells
Contd…CPK-MB-no kit
Sputum C/S
Sputum AFB (sample sent)
Blood C/S
ELISA –HIVManteaux- negative
Initial treatment:
Inj.Ceftriaxone 1g i.v b.dInj.Metronidazole 500 mg i.v t.i.d
Inj.Deriphylline 2cc i.v b.dInj.Ranitidine 50 mg i.v b.d
T.Bromhexine 1 t.i.dT.Paracetomol 1 t.i.d
Salbutamol nebulisation 6 hrlyTepid sponging
6/6/10
Anaesthetic fitness obtained for emergency pericardectomy
Pt. transferred to CTS ward
16/6/10 Pt. GC was stable, afebrile, not dyspneic
JVP - prominent “y” descent
Vitals : stable
CVS,ABDOMEN,CNS – NAD
RS: BAE, minimal crepitations+ in left lower lung
fields
Contd….Sputum C/S – Streptococcus pneumoniae
grown, sensitive to cefotaxim,ceftriaxone
Sputum AFB –negative
Blood C/S – no growth
ELISA-HIV- negative
17/6/10 Repeat Echo: Pericardial effusion 14 mm +
Moderately dense strands + in posterior aspect
Septal bounce+
IVC dilated
Minimal respiratory variation Features S/O constrictive pericarditis
Final diagnosis LEFT LOWER LOBE PNEUMONITIS
EFFUSIVE PERICARDITIS
CONSTRICTIVE PERICARDITIS
5/7/10
Pericardectomy was done(! finally)
Specimen AFB-negative
c/s – No growth
Biopsy-report not obtained
Post op ECG:
Discussion : PERICARDITIS - inflammation of the pericardium ,both
visceral and parietal
CLASSIFICATION : 1.Clinical 2.Aetiological
Clinical classification 1.acute pericarditis < 6 weeks a. fibrinous b.effusive 2.subacute pericarditis 6 weeks – 6 months a.effusive b.constrictive3.chronic pericarditis > 6 months a. constrictive b. effusive
Aetiological classification 1. Infectious pericarditis
a.viral – cox A, B ,ECHO ,mumps ,HIV, hepatitis b.pyogenic- pneumococcus ,staphylococcus ,neisseria legionella c.tuberculosis d.fungal e.protozoal 2.Non infectious: a. AMI d. myxedema g. trauma b. uremia e. cholesterol h.aortic
dissection c.neoplasia f. chylopericardium i.post
irradiation FAMILIAL –mulibrey nanism
3. Pericarditis related to hypersensitivity /autoimmunity:
a.rheumatic fever b.collagen vascular diseases c. drugs - procainamide ,hydralazine d.post cardiac injury 1) dressler 2) post pericardiotomy 3) post traumatic
Clinical picture Chest pain –sharp ,pleuritic ,lower left sternal border, radiation to the trapezius,aggravated on lying down,relieved on upright posture ; others: fever ,dyspnea ,cough ,hiccough Signs pericardial friction rub - 85 % patients ,lower left sternal border ,grating /scratching - three components –ventricular systole ,early diastole ,atrial contraction Signs that are clues to etiological diagnosis
Laboratory investigations :
ECG – changes secondary to acute subepicardial inflammation 4 stages ;-- stage 1. widespread ST segment elevation
with upward concavity ,PR segment
depression stage 2 . ST segment returning to normal stage 3 . T wave inversion stage 4 . ECG returning to normal differential diagnosis– AMI ,ERS
CARDIAC ENZYMES – CPK MB and TROP I elevated-silent myo
carditis TROP I modestly elevated
without CPKMB –epicardial
inflammation ECHO: usually normal silent effusion ventricular dysfunction associated with myo
carditis OTHER INV; CBC ,CHEST X RAY ,INV. TO FIND OUT SPECIFIC
AETIOLOGY LIKE ANA FOR SLE
MANAGEMENT Depends on the aetiology :
If the diagnosis is uncertain it is labelled as ‘acute idiopathic
pericarditis ‘ treatment of which is T.Brufen 600 mg tid if no or inadequate response T. colchicine or T.prednisolone can be
given if still no response / develops effusion admission and diagnostic centesis and
treat accordingly
Viral pericarditis Most common infection of the pericardium ;
Coxsackie A,B , mumps ,ECHO ,influenza ,HIV, CMV ,
Develops 10 – 12 days after a presumed viral illness Presents in association with pneumonitis & pleural
effusion Management ; hyper immune globulin – CMV, parvovirus ,adeno virus interferon alpha – coxsackie B aspirin 2 – 4 mg /day brufen/colchicine / prednisolone
Bacterial pericarditis Characterised by purulent effusion Organisms – staphylococcus ,peumococcus ,streptococcus, neisseria ,legionella Mode of spread – 1. contiguous –extension from pneumonia /empyema head neck /mediastinum 2. haematogenous Clinical manifestations ;- high grade fever ,chills ,rigor chest pain , dyspnea ,pericardial rub
Laboratory features ;- CBC – leucocytosis with left shift , Pericardial fluid- high protein ,low glucose ,increased neutrophils ,high LDH specific organism can be grown
Management Suspected /proven bacterial pericarditis is a medical
emergency
Closed pericardiocentesis and subsequent catheter drainage for three to four days
Purulent pericardial effusions likely to recur ,hence pericardial window necessary
If patient develops constrictive pericarditis – pericardiectomy done
Tuberculous pericarditis More common in the developing world ;more in immuno
compromised;
Clinical picture : - chronic systemic illness with pericardial effusion /constrictive pericarditis ; -only 3 -4% present with acute/subacute pericarditis;
Pericardial involvement usually secondary to peribronchial peritracheal or mediastinal lymphnode involvement
Haematogenous spread is also common Contiguous spread from a necrotic focus less common
Diagnosis Definite diagnosis –isolating the organism from the pericardial fluid or biopsy—very
difficult
Adjuvant investigations – pericardial fluid ADA > 40 u/l
mantoux,IFN gamma
PCR to detect M.tuberculosis DNA Management ;- even if the definitive diagnosis is lacking but
biopsy shows granuloma, anti tuberculous drugs can be startedCorticosteroids -role inconclusive
Constrictive pericarditis Its an end stage of inflammatory process involving the pericardium
Causes : Idiopathic,infection ,irradiation ,postsurgical, Autoimmune ,neoplastic ,uremia ,posttrauma sarcoidosis ,methysergide therapy ,
Tuberculosis is an important cause in developing countries;
:
Pathophysiology:
inflammation of the pericardium
fibrosis & calcification adhesion between visceral & parietal
pericardium constrictive pericarditis
Hemodynamics restricted filling of heart
elevation and equilibration of filling pressures in all chambers ventricles fill abnormally & rapidly in early diastole
early to middiastole ventricular filling ceases due to stiff pericardium /all filling occurs in early diastole
“the prominent y descent”
Contd……. 1. Failure of transmission of intrathoracic pressure to cardiac
chambers –vital factor in the hemodynamics of constrictive pericarditis ; inspiration –drop in intrathoracic pressure
drop in pulmonary venous pressure but not left atrial pressure
decreased pulmonary vein to left atrial pressure gradient leading to dec.LV filling & inc.RV
filling & septal shift to left “Exaggerated respiratory variation in flow velocity”
Clinical presentation Initial symptoms : leg swelling ,abdominal distension, anasarca Later – exertional dyspnea ,cough ,orthopnea ,muscle
wasting , cachexia Signs : elevated JVP –prominent x & y descent –results in
M/W pattern Kussmaul’s sign positive Pericardial knock present TR murmur + hepatomegaly +
Laboratory investigations ECG ; nonspecific T wave changes reduced voltage of QRS complex atrial fibrillation Chest x ray; cardiac silhoutte enlarged pericardial calcification pleural effusion Prominent pulmonary vasculatureECHO ; pericardial thickening ,abrupt displacement of
the IVS during early diastole ;septal bounce SVC & IVC dilated ;Doppler flow velocity –exaggerated respiratory variations in mitral flow velocityCardiac catheterisation– square root sign
Management Medical management ; -- diuretics ,salt restriction
Surgical management ; --pericardiectomy is the definitive treatment Prognosis LV diastolic function returns to normal in 90 –
95 % of cases early or late poor prognosis associated with myocardial
atrophy or fibrosis ,incomplete resection ,mediastinal
fibrosis
Cardiac tamponade :
accumulation of fluid in pericardial space
sufficent to cause obstruction to inflow of blood
cardiac tamponade
Quantity of fluid 200 ml -if accumulates rapidly; >2000 ml –if slow accumulation;
Causes 1.Neoplastic disease
2.Idiopathic pericarditis
3.Renal failure 4. Tuberculosis
5.Hemopericardium due to use of anticoagulants
6.Bleeding into the pericardial cavity following cardiac surgeries
Hemodynamics fluid accumulation in pericardial sac
atrial & ventricular diastolic pressure rise
equalise at a pressure similar to that of pericardial sac -15 – 20 mmhg
small end diastolic ventricular volume /stroke volume
hypotension
The mean initial right atrial pressure is lower than the left
atrial pressure and hence as the fluid accumulates right
sided diastolic collapse occurs;
The total heart volume is fixed in cardiac tamponade ;
The loss of y descent and the presence of x descent can be
explained by the above concept
y descent occurs usually when tricuspid valve
opens
blood is not leaving the heart
no blood can enter the heart
loss of y descent
x descent occurs during ventricular ejection
blood leaves the heart
venous inflow present
x descent retained
Pulsus paradoxus During inspiration
increase in rt.heart filling
IVS shift to left
decreased LV filling ( due to constancy of
heart volume)
decreased LV stroke volume
Clinical features
Cough ,dyspnea ,orthopnea Pericardial pain /discomfort
Signs – diaphioretic ,cyanosis ,altered
sensorium ,hypotension tachycardia ,tachypnea pulsus paradoxus , BECK’s triad
Lab. Investigations ECG ; reduced voltage and electrical alternans
( antero posterior swinging of the heart ) Chest x ray ;- enlarged cardiac silhoutte ,flask shaped heart oligaemic lung fields Echo ; pericardial effusions , RA and RV diastolic collapse exaggerated respiratory variations in mitral flow velocities
Management It is a potential medical emergency
In critically ill patients emergency closed pericardiocentesis
is done
In mild effusions such as due to idipathic effusions conservative
management with a course of NSAIDs /colchicine used
In case of loculated effusion and effusion containing clots /purulent exudates an open approach with a window is advisable
Effusive constrictive pericarditis Combination of tense effusion and constriction of
heart by thickened pericardium Features of effusion causing compression and
constrictive pericarditis present Causes ; tuberculosis,
scleroderma ,radiation ,neoplasm ,renal failure Diagnosis pericardiocentesis and biopsy Treatment pericardiectomy
Low pressure tamponade Mild tamponade where intra pericardial pressure is
slightly elevated to 5 – 10 mmhg
CVP is slightly elevated
Arterial pressure is unaffected No paradoxical pulse ;Usually associated with
hypovolemia
Treatment ; periacrdiocentesis
References
Harrison’s principles of internal medicine -17 th edition Braunwald’s heart disease -8 th edition