AzTrials
AzTrials

Pulmonary EmbolismTELOSNCT01908231

Prognostic Value of Plasma Lactate Levels Among Patients With Acute Pulmonary Embolism

An observational study of Pulmonary Embolism, run by Azienda Ospedaliero-Universitaria Careggi at 4 sites in 2 countries.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
Search all trials

Trial summary

To prospectively investigate the association between plasma lactate concentration and short-term adverse outcomes in patients with acute PE. Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
Pulmonary Embolism
How many people
330 participants
Where
4 sitesin 2 countries
Study dates
Dec 2012to Feb 2014
Phase
Observational
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Study population: Consecutive adult patients (minimum age eighteen) who presented to the ED of the hospitals participating in the study with clinical suspicion of PE will be considered for the study. We excluded patients with life expectancies of less than 3 months, and patients with first symptoms 15 day or more before inclusion. The diagnosis of PE will be established by spiral computed tomography or by lung scan or a selective pulmonary angiogram. Patients with proven PE who will give written consent to the use of their medical information for research purposes will be enrolled in the study.

Who may be able to join

  • Symptomatic objective pulmonary embolism

Who cannot join

  • life expectancies of less than 3 months
  • first symptoms 15 day or more before inclusion.

Trial locations and contacts

4 sites in 2 countries.

4 sites in 2 countries

Italy3 sites
  • Azienda Ospedaliero Universitaria Careggi, Emergency Department

    Florence, 50134

  • Presidio Ospedaliero Livorno

    Livorno

  • Azienda ospedaliera universitaria San Giovanni Battista (Molinette)

    Torino

Other trials in Italy

Spain1 site
  • Respiratory Department and Medicine Department, Ramón y Cajal Hospital and Alcalá de Henares University

    Madrid

Other trials in Spain

About this study

Official title: Prognostic Value of Plasma Lactate Levels Among Patients With Acute Pulmonary Embolism: the Thrombo-Embolism Lactate Outcome Study

To prospectively investigate the association between plasma lactate concentration and short-term adverse outcomes in patients with acute PE.

Read the detailed description

Pulmonary embolism (PE) represents 0.4% of hospitalizations and is the third leading cause of death due to cardiovascular disease (1). In contrast to stroke and acute coronary syndromes, its mortality has not decreased in recent decades likely due to only minor advances in short-term prognostication and treatment strategies (2).The presence of shock or hypotension remains the principal prognostic clinical marker and,to date, is the only factor that clearly indicates a more aggressive treatment than heparin (3). However, only 5% of patients with acute PE present with shock. The majority of PE patients are normotensive and are usually treated with heparin alone. Several studies have looked for new prognostic indicators in order to better stratify normotensive PE patients. A large body of evidence shows that right ventricular dysfunction/injury markers such as elevation of brain natriuretic peptides, troponins, and echocardiographic evidence of right ventricular dysfunction (RVD) are associated with adverse prognosis (3-8). However, these markers have some important limitations. Echocardiography is usually not available around-the-clock in most clinical settings, moreover it shares with troponins and natriuretic peptides a good negative predictive value (>90%) but a low positive predictive value (about 10%) for short-term mortality, probably precluding these markers' usefulness to target more aggressive treatments (8).

Plasma lactate concentration is a marker of the severity of the tissue oxygen supply-to-demand imbalance. It may reflect tissue hypoperfusion also in the presence of normal blood pressure. Accordingly, in other critical settings such as sepsis,plasma lactate concentration is considered to be an accurate prognostic marker as it rises before hemodynamic impairment is clinically evident (9). Furthermore, plasma lactate concentration can be easily and rapidly assayed on arterial blood samples using a blood gas analyzer, which is usually available in emergency departments (EDs) and intensive care units. Recently, a retrospective study showed that plasma lactate ≥ 2 mmol/L was associated with a high mortality rate in patients with acute PE (10). Moreover a prospective monocentric study confirmed these retrospective results and revealed that plasma lactate has prognostic relevance beyond known clinical and instrumental prognostic markers (TELOS study, Ann Emerg Med, in press, see attached file)

The aim of present study is to prospectively investigate the association between plasma lactate concentration and short-term adverse outcomes in patients with acute PE. In particular, we examine whether high plasma lactate (≥ 2 mmol/L) is associated with a high incidence of PE related major adverse events, defined as PE related death or hemodynamic collapse >10% within 7 days of follow-up. Moreover we investigate whether plasma lactate shows incremental prognostic value to clinically overt hemodynamic impairment and to RVD/injury markers, maintaining prognostic relevance in both hypotensive and normotensive PE patients.

Keywords
Pulmonary embolism, plasma lactate, right ventricular dysfunction
Medical subject headings
Pulmonary Embolism, Ventricular Dysfunction, Right

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

Study groups in NCT01908231
Study groupRoleWhat they receive
Pulmonary EmbolismConsecutive adult patients (minimum age eighteen) who presented to the ED of the hospitals participating in the study with clinical suspicion of PE will be considered for the study. We excluded patients with life expectancies of less than 3 months, and patients with first symptoms 15 days or more before inclusion.

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. The composite of PE related death or hemodynamic collapse

    PE related death was defined as a fatal event occurring in the hours after clinical deterioration due to PE, including an objectively diagnosed recurrent PE, or if death could not be attributed to a documented cause and PE could not be confidently ruled out. Autopsy is not mandatory.

    Hemodynamic collapse is defined as at least 1 of the following: (i) the need for cardiopulmonary resuscitation; (ii) systolic blood pressure <90 mm Hg for at least 15 minutes, or drop of systolic blood pressure by at least 40 mm Hg for at least 15 minutes, with signs of end-organ hypoperfusion (cold extremities, or urinary output <30 mL/h, or mental confusion); (iii) the need for catecholamines (except for dopamine at a rate of < 5 μg kg-1 min-1) to maintain adequate organ perfusion and a systolic blood pressure of >90 mm Hg; (iiii) the need for invasive or noninvasive mechanical ventilation; (iiiii) imaging-confirmed symptomatic recurrence of PE within 7 days.

    Measured: 7 days.

Secondary outcomes (2)
  1. all cause death

    Measured: 30 days

  2. PE recurrence

    Measured: 30 days

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted25 Jul 2013 (estimated)
  2. Study startDec 2012
  3. Primary completionJan 2014
  4. Study completionFeb 2014

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Observational
Observational model
Cohort
Time perspective
Prospective
Enrolment
330 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT01908231
Sponsor's protocol ID
0313
Acronym
TELOS
Status last verified
Feb 2014
First submitted
23 Jul 2013
Last updated
19 Feb 2014
Results posted
No
Data monitoring committee
No

Publications

  • Pulido T, Aranda A, Zevallos MA, Bautista E, Martinez-Guerra ML, Santos LE, Sandoval J. Pulmonary embolism as a cause of death in patients with heart disease: an autopsy study. Chest. 2006 May;129(5):1282-7. doi: 10.1378/chest.129.5.1282.

    PubMed 16685020
  • Burge AJ, Freeman KD, Klapper PJ, Haramati LB. Increased diagnosis of pulmonary embolism without a corresponding decline in mortality during the CT era. Clin Radiol. 2008 Apr;63(4):381-6. doi: 10.1016/j.crad.2007.10.004. Epub 2007 Dec 21.

    PubMed 18325357
  • Torbicki A, Perrier A, Konstantinides S, Agnelli G, Galie N, Pruszczyk P, Bengel F, Brady AJ, Ferreira D, Janssens U, Klepetko W, Mayer E, Remy-Jardin M, Bassand JP; ESC Committee for Practice Guidelines (CPG). Guidelines on the diagnosis and management of acute pulmonary embolism: the Task Force for the Diagnosis and Management of Acute Pulmonary Embolism of the European Society of Cardiology (ESC). Eur Heart J. 2008 Sep;29(18):2276-315. doi: 10.1093/eurheartj/ehn310. Epub 2008 Aug 30.

    PubMed 18757870
  • Grifoni S, Olivotto I, Cecchini P, Pieralli F, Camaiti A, Santoro G, Conti A, Agnelli G, Berni G. Short-term clinical outcome of patients with acute pulmonary embolism, normal blood pressure, and echocardiographic right ventricular dysfunction. Circulation. 2000 Jun 20;101(24):2817-22. doi: 10.1161/01.cir.101.24.2817.

    PubMed 10859287
  • Kucher N, Goldhaber SZ. Cardiac biomarkers for risk stratification of patients with acute pulmonary embolism. Circulation. 2003 Nov 4;108(18):2191-4. doi: 10.1161/01.CIR.0000100687.99687.CE. No abstract available.

    PubMed 14597581
  • Kline JA, Zeitouni R, Marchick MR, Hernandez-Nino J, Rose GA. Comparison of 8 biomarkers for prediction of right ventricular hypokinesis 6 months after submassive pulmonary embolism. Am Heart J. 2008 Aug;156(2):308-14. doi: 10.1016/j.ahj.2008.03.026. Epub 2008 Jun 18.

    PubMed 18657661
  • Binder L, Pieske B, Olschewski M, Geibel A, Klostermann B, Reiner C, Konstantinides S. N-terminal pro-brain natriuretic peptide or troponin testing followed by echocardiography for risk stratification of acute pulmonary embolism. Circulation. 2005 Sep 13;112(11):1573-9. doi: 10.1161/CIRCULATIONAHA.105.552216. Epub 2005 Sep 6.

    PubMed 16144990
  • Shapiro NI, Trzeciak S, Hollander JE, Birkhahn R, Otero R, Osborn TM, Moretti E, Nguyen HB, Gunnerson KJ, Milzman D, Gaieski DF, Goyal M, Cairns CB, Ngo L, Rivers EP. A prospective, multicenter derivation of a biomarker panel to assess risk of organ dysfunction, shock, and death in emergency department patients with suspected sepsis. Crit Care Med. 2009 Jan;37(1):96-104. doi: 10.1097/CCM.0b013e318192fd9d.

    PubMed 19050610
  • Vanni S, Socci F, Pepe G, Nazerian P, Viviani G, Baioni M, Conti A, Grifoni S. High plasma lactate levels are associated with increased risk of in-hospital mortality in patients with pulmonary embolism. Acad Emerg Med. 2011 Aug;18(8):830-5. doi: 10.1111/j.1553-2712.2011.01128.x.

    PubMed 21843218
  • Vanni S, Polidori G, Vergara R, Pepe G, Nazerian P, Moroni F, Garbelli E, Daviddi F, Grifoni S. Prognostic value of ECG among patients with acute pulmonary embolism and normal blood pressure. Am J Med. 2009 Mar;122(3):257-64. doi: 10.1016/j.amjmed.2008.08.031.

    PubMed 19272487
  • Grifoni S, Vanni S, Magazzini S, Olivotto I, Conti A, Zanobetti M, Polidori G, Pieralli F, Peiman N, Becattini C, Agnelli G. Association of persistent right ventricular dysfunction at hospital discharge after acute pulmonary embolism with recurrent thromboembolic events. Arch Intern Med. 2006 Oct 23;166(19):2151-6. doi: 10.1001/archinte.166.19.2151.

    PubMed 17060547

Questions about this trial

What is this clinical trial studying?

An observational study of Pulmonary Embolism, run by Azienda Ospedaliero-Universitaria Careggi at 4 sites in 2 countries.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 1 inclusion and 2 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 19 Feb 2014. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 4 sites in Italy, Spain. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

The composite of PE related death or hemodynamic collapse (time frame: 7 days.). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT01908231, which also lists 11 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 19 Feb 2014.

Free account

Log in to keep searching

You’ve used your 3 free searches. AzTrials is free: log in or create a free account to keep searching clinical trials and save the ones you want to follow.

Create a free accountLog in