PE can be classified in several ways: 1. By the temporal pattern of presentation - acute, subacute, or chronic. Acute PE develops symptoms immediately after obstruction, subacute develops within days/weeks, and chronic develops over many years. 2. By hemodynamic stability - hemodynamically unstable or stable. Unstable PE results in hypotension while stable PE does not meet that definition. 3. By anatomic location - saddle, lobar, segmental, or subsegmental depending on where in the pulmonary arteries the clot lodges. 4. By presence of symptoms - symptomatic PE leads to diagnosis due to symptoms while asymptomatic PE is an incidental finding without symptoms.

1. TEP
consiste enlaoclusiondel lechoarterial pulmonarporuntrombo(embolo) desprendidodesde
algunaparte del territoriovenoso
TEP: urgenciacardiovascularcomun,que pone enriesgolahemodinamiadel paciente,porque
puede producirunainsufic.VD aguda.
TEP-TVP:ETV
La tEPno puede entenderse comounaenfermedadindependientede laTVP,sinocomouna
mismaentidad.Porestarazonactualmente se prefiereemplearel terminoenfermedad
tromboembolicapararesaltarque se trata de manifestacionesde lamismaenfermedad
.
90-95% el origenesuna TVPde EEII, generalmente asintomatica.
10-20% de las TVPproducenTEP
Dx precozfundamental,yaque el tratamientoesaltamente efectivo,restableciendoflujode
arteriasocluidas,previniendorecurrenciasprecocesmorales.
CLASIFICACION
A pesarde que es llamativolaclasificacionde TEP,ensi no tiene incidenciaabsolutacomotal en
lascomorbilidadesdelpacienteysolose centraenel Eventoembolicoensi,asi unaTEP aguda NO
MASIVA podriaestarasociado a un altoriesgode complicacionesenunpaciente conmuchas
comorbilidades,comounEPOCo ICCongestiva.
CLASIFICACION
TEP MASIVO20%: definicionmasanatomica,refiriendose aobstruccionmayoral 50% de vasos
pulmonaresode doso mas arteriaslobareso basarse enla fx CardioPulmdel paciente.
AHA define:
TEP aguda con shocky/o hipotension
PA sistolicamenora90 al menos15 min, o que requiere apoyoinotropico,sinque lacausasea
arritmia,hipovolemia,sepsisodisfuncionVI,ausenciade ppulsos,bradicardiaprodunda(menora
40 lpmcon signosde shock)
- Mortalidaddel 52%
- Implicaterapiavasopresora

2. TEP GRAVE: combinacion,inestabilidadhemodinamica (desde hipotension-parocardiaco)-
mortalidad30%.
TEP submasivo:hipoquinesiaVDporecocardio sinhipotensionni shock.Mayormortalidad
Epidemiologia
Tercera causa de muerte CV,luegode CardioPisque yACV
Hombres>ujeres
Aumentaconedad
Mortalidad11% primerahora
Difícil de determinardadoque ungran grupopermanece asintomático.
100-200/1000.000 habitantes
317.000 muertesde 454 mill de seispaissde UE

3. -34% muere súbita
-59% muere por unaEP sindiagnosticardurante lavida
-7% muerenpostuncorrecto diagnosticoprevio.
>40 añosriesgo
Niños53-57/100.000 por año
Nomenclature — PE can be classified by the following: ●The temporal pattern of
presentation (acute, subacute, or chronic) –
Patients with PE can present acutely, subacutely, or chronically: •Acute –
Patients with acute PE typically develop symptoms and signs immediately after
obstruction of pulmonary vessels. •Subacute – Some patients with PE may also present
subacutely within days or weeks following the initial event. •Chronic – Patients with chronic
PE slowly develop symptoms of pulmonary hypertension over many years (ie, chronic
thromboembolic pulmonary hypertension; CTEPH). An overview of acute and subacute PE
is discussed in this review. The etiology, clinical manifestations, diagnosis, and treatment
of CTEPH are discussed separately. (See "Clinical manifestations and diagnosis of chronic
thromboembolic pulmonary hypertension" and "Overview of the treatment of chronic
thromboembolic pulmonary hypertension".) ●The presence or absence of hemodynamic
stability (hemodynamically unstable or stable) – Hemodynamically unstable and stable PE
(sometimes called massive or submassive, respectively) are defined as the following:
•Hemodynamically unstable PE is that which results in hypotension. Hypotension is
defined as a systolic blood pressure <90 mmHg for a period >15 minutes or that requiring
vasopressors or inotropic support and not explained by other causes including sepsis,
arrhythmia, left ventricular dysfunction from acute myocardial ischemia or infarction, or
hypovolemia. Although hemodynamically unstable PE is often caused by large (ie,
massive) PE, it can sometimes be due to small PE in patients with underlying
cardiopulmonary disease. Importantly, not all patients with massive PE develop
hypotension. (See 'Pathophysiologic response to PE' below.) •Hemodynamically stable PE
is defined as PE that does not meet the definition of hemodynamically unstable PE. There
is a spectrum of severity within this population ranging from patients who present with
small asymptomatic PE to those who present with mild or borderline hypotension that
stabilizes in response to fluid therapy, or those who present with right ventricle dysfunction
(also known as “intermediate” PE). (See "Fibrinolytic (thrombolytic) therapy in acute
pulmonary embolism and lower extremity deep vein thrombosis", section on
'Hemodynamically stable patients'.) The distinction between hemodynamically stable and
unstable PE is important because patients with hemodynamically unstable PE are more

4. likely to die from obstructive shock (ie, severe right ventricular failure). Importantly, death
from hemodynamically unstable PE often occurs within the first two hours, and the risk
remains elevated for up to 72 hours after presentation [1,2]. (See "Clinical presentation,
evaluation, and diagnosis of the adult with suspected acute pulmonary embolism", section
on 'Hemodynamically unstable patients' and "Fibrinolytic (thrombolytic) therapy in acute
pulmonary embolism and lower extremity deep vein thrombosis", section on
'Hemodynamically unstable patients' and "Overview of the treatment, prognosis, and
follow-up of acute pulmonary embolism in adults", section on 'Prognosis'.) ●The anatomic
location (saddle, lobar, segmental, subsegmental) – Saddle PE lodges at the bifurcation of
the main pulmonary artery, often extending into the right and left main pulmonary arteries.
Approximately 3 to 6 percent of patients with PE present with a saddle embolus [3,4].
Traditionally, saddle PE was thought to be associated with hemodynamic instability and
death. However, retrospective studies suggest that among those diagnosed with a saddle
embolus, only 22 percent are hemodynamically unstable, with an associated mortality of 5
percent [3,4]. Other smaller PE (and occasionally saddle emboli) will move beyond the
bifurcation of the main pulmonary artery to lodge distally in the main lobar, segmental, or
subsegmental branches of the pulmonary artery. Smaller thrombi that are located in the
peripheral segmental or subsegmental branches are more likely to cause pulmonary
infarction and pleuritis (image 1). (See 'Pathophysiologic response to PE' below.) ●The
presence or absence of symptoms (symptomatic or asymptomatic) – Symptomatic PE
refers to the presence of symptoms that usually leads to the radiologic confirmation of PE,
whereas asymptomatic PE refers to the incidental finding of PE on imaging in a patient
without symptoms (eg, contrast-enhanced computed tomography). (See "Clinical
presentation, evaluation, and diagnosis of the adult with suspected acute pulmonary
embolism", section on 'Diagnosis'.)