infective endocarditis
DESCRIPTION
Infective EndocarditisTRANSCRIPT
INFECTIVE INFECTIVE ENDOCARDITISENDOCARDITIS
Mr. ALFRIN ANTONYMr. ALFRIN ANTONYAsst. LecturerAsst. Lecturer
DEPARTMENT OF PATHOLOGYDEPARTMENT OF PATHOLOGY
+919738286092+919738286092
ENDOCARDITISENDOCARDITIS Inflamation of endocardium Inflamation of endocardium A. Non-InfectiveA. Non-Infective Rheumatic EndocarditisRheumatic Endocarditis Atypical Verrucous EndocarditisAtypical Verrucous Endocarditis Non bacterial thrombotic EndocarditisNon bacterial thrombotic Endocarditis B. InfectiveB. Infective Bacterial endocarditisBacterial endocarditis Other Infective types (tuberculosis,Other Infective types (tuberculosis, syphilitic, fungal, viral, syphilitic, fungal, viral,
rickettsial)rickettsial)
Infective EndocarditisInfective Endocarditis
Febrile illnessFebrile illness Persistent bacteremiaPersistent bacteremia Characteristic lesion of microbial Characteristic lesion of microbial
infection of the endothelial surface of infection of the endothelial surface of the heart the heart
Variable in sizeVariable in size Amorphous mass of fibrin & plateletsAmorphous mass of fibrin & platelets Abundant organismsAbundant organisms Few inflammatory cellsFew inflammatory cells
the vegetation
BACTERIAL BACTERIAL ENDOCARITISENDOCARITIS
DEFINITION:-DEFINITION:- Bacterial Bacterial endocarditis is serious infection of endocarditis is serious infection of the valvular and mural endocardium the valvular and mural endocardium caused by different forms of bacteria caused by different forms of bacteria (other than tubercle bacilli and (other than tubercle bacilli and bacterial micro organisms) and bacterial micro organisms) and characterized by typical infected and characterized by typical infected and friable vegetationsfriable vegetations
CLASSIFICATIONCLASSIFICATIONdepending on severitydepending on severityAcute Acute
Acute bacterial Acute bacterial endocarditis:- is the endocarditis:- is the fulminant and fulminant and obstructive acute obstructive acute infection of the infection of the endocardium by endocardium by highly virulent highly virulent bacteria in a bacteria in a previously normal previously normal heart (heart (fatal2-6 fatal2-6 weeks)weeks)
SubacuteSubacute Subacute bacterial Subacute bacterial
endocarditis is endocarditis is caused by less caused by less virulent bacteria in virulent bacteria in a previously a previously diseased heart and diseased heart and has a gradual down has a gradual down hill course in a hill course in a period of 6 weeks period of 6 weeks to months-yearsto months-years
INCIDENCEINCIDENCE
Bacterial endocaditis may occur at Bacterial endocaditis may occur at any ageany age
Most cases more than 50yeasMost cases more than 50yeas Males > femalesMales > females
ETIOLOGYETIOLOGY1.Infective agents1.Infective agents
SABESABE
1.1. Streptococci with Streptococci with low virulencelow virulence
2.2. Streptococcus Streptococcus viridans (mouth)viridans (mouth)
3.3. Streptococci bovis Streptococci bovis (stomach)(stomach)
4.4. Streptococcus Streptococcus pneumoniaepneumoniae
5.5. Staphylococcus Staphylococcus epidermidisepidermidis
ABEABE
1.1. Staphylococci Staphylococci (staphylococcus (staphylococcus aureus)aureus)
2.2. PneumococciPneumococci
3.3. GonococciGonococci
4.4. Beeta-streptococciBeeta-streptococci
5.5. Enterococci Enterococci
Predisposing factorsPredisposing factors
1.1. Bacteraemia, septicemia and Bacteraemia, septicemia and pyaemiapyaemia
2.2. Underlying heart diseaseUnderlying heart disease
3.3. Impaired host defenceImpaired host defence
PathogenesisPathogenesis
1.1. The circulating bacteria are lodged The circulating bacteria are lodged much more frequently on previously much more frequently on previously damaged valves from disease, chiefly damaged valves from disease, chiefly RHD nad CHD than healthy valvesRHD nad CHD than healthy valves
2.2. Conditions producing haemodynamic Conditions producing haemodynamic stress on the valves are liable to cause stress on the valves are liable to cause damage to the endocardium, favouring damage to the endocardium, favouring the formation platelets thrombi which the formation platelets thrombi which gets infected from circulating bacteriagets infected from circulating bacteria
3.3. Non-bacterial thrombotic endocarditis Non-bacterial thrombotic endocarditis occurs from prolonged stressoccurs from prolonged stress
PATHOLOGIC CHANGESPATHOLOGIC CHANGES
MACROSCOPICALLYMACROSCOPICALLY Lesions are in Lesions are in
mitral>aortic>both > mitral>aortic>both > right heartright heart
SABE > ABESABE > ABE
MICROSCOPICALLYMICROSCOPICALLY The out layer consists The out layer consists
of eosinophilic of eosinophilic material composed of material composed of fibrin plateletsfibrin platelets
Underneath layer is Underneath layer is the basophilic zone the basophilic zone containing colonies of containing colonies of bacteriabacteria
The deeper zone The deeper zone consists of non-consists of non-specific inflammatory specific inflammatory reactionreaction
SymptomsSymptoms
AcuteAcute High grade fever High grade fever
and chillsand chills Arthralgias/ Arthralgias/
myalgiasmyalgias Abdominal painAbdominal pain Pleuritic chest painPleuritic chest pain Back painBack pain
SubacuteSubacute Low grade feverLow grade fever AnorexiaAnorexia Weight lossWeight loss FatigueFatigue Arthralgias/ Arthralgias/
myalgiasmyalgias Abdominal painAbdominal pain
The onset of symptoms is usually ~2 weeks or less from the initiating bacteremia
SignsSigns Fever Fever Heart murmurHeart murmur Nonspecific signs – petechiae, Nonspecific signs – petechiae,
subungal or “splinter” hemorrhages, subungal or “splinter” hemorrhages, clubbing, splenomegaly, neurologic clubbing, splenomegaly, neurologic changeschanges
More specific signs - Osler’s Nodes, More specific signs - Osler’s Nodes, Janeway lesions, and Roth SpotsJaneway lesions, and Roth Spots
PetechiaePetechiae
Photo credit, Josh Fierer, M.D. medicine.ucsd.edu/clinicalimg/ Eye-Petechiae.html
Harden Library for the Health Scienceswww.lib.uiowa.edu/ hardin/md/cdc/3184.html
1.Nonspecific2.Often located on extremities
or mucous membranesdermatology.about.com/.../ blpetechiaephoto.htm
Splinter HemorrhageSplinter Hemorrhage
Splinter HemorrhagesSplinter Hemorrhages
1. Nonspecific2. Nonblanching3. Linear reddish-brown lesions found under the nail bed4. Usually do NOT extend the entire length of the nail
Osler’s NodesOsler’s Nodes
Osler’s NodesOsler’s Nodes
1. More specific2. Painful and erythematous nodules3. Located on pulp of fingers and toes4. More common in subacute IE
American College of Rheumatologywebrheum.bham.ac.uk/.../ default/pages/3b5.htm www.meddean.luc.edu/.../
Hand10/Hand10dx.html
Janeway LesionsJaneway Lesions
Janeway LesionsJaneway Lesions
1. More specific2. Erythematous, blanching macules 3. Nonpainful4. Located on palms and soles
Subconjunctival Subconjunctival HemorrhagesHemorrhages
COMPLICATIONSCOMPLICATIONS
CARDIACCARDIAC Valvular stenosis or Valvular stenosis or
insufficiencyinsufficiency Perforation, rupture Perforation, rupture
and aneurysm of and aneurysm of valve and leafletsvalve and leaflets
Abscesses in the Abscesses in the valve ringvalve ring
Myocardial abscessesMyocardial abscesses Suppurative Suppurative
pericarditispericarditis Cardiac failureCardiac failure
EXTRA CARDIACEXTRA CARDIAC Infracts in spleen, Infracts in spleen,
kidneys and brainkidneys and brain Pulmonory abscessesPulmonory abscesses Petechiae (skin Petechiae (skin
conjunctiva)conjunctiva) Osler’s nodes(SABE)Osler’s nodes(SABE) Janeway’s spots (ABE)Janeway’s spots (ABE)
Local Spread of InfectionLocal Spread of Infection
Acute S. aureus IE with perforation of the aortic valve and aortic valve vegetations.
Acute S. aureus IE with mitral valve ring abscess extending into myocardium.
Septic Pulmonary EmboliSeptic Pulmonary Emboli
http://www.emedicine.com/emerg/topic164.htm
Septic Retinal EmbolusSeptic Retinal Embolus
Roth’s SpotsRoth’s Spots
TUBERCULOUS TUBERCULOUS ENDOCARDITISENDOCARDITIS
It is characterized by presence of It is characterized by presence of typical tubeculosis on the typical tubeculosis on the valvular as well as mural valvular as well as mural endocardium and form endocardium and form tuberculosis thrombo embolituberculosis thrombo emboli
Syphilis endocaditisSyphilis endocaditis
Aortic valvular incompitance Aortic valvular incompitance (severe)(severe)
Fungal endocaditisFungal endocaditisOppurtunistic fungal Oppurtunistic fungal infections like candidiasis infections like candidiasis ans aspergillosis are seen I ans aspergillosis are seen I patients receiving long term patients receiving long term anti biotic therapyanti biotic therapy
Viral endocarditisViral endocarditis
Only in experimentOnly in experiment
Rickettsial endocarditisRickettsial endocarditis
Another rare cause of Another rare cause of endocaditis is form endocaditis is form infection in Q feverinfection in Q fever