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NCT number NCT02062983
Study type Observational
Source National Guard Health Affairs
Status Suspended
Phase N/A
Start date June 2012
Completion date August 2016

Clinical Trial Summary

Early identification of patients at risk for cardiotoxicity represent a primary goal for cardiologist and oncologist

From all adjuvant trials echocardiography is ideal for evaluating Left Ventricular function though its operator dependent. The use of other technique such as endomyocardial biopsy, is troublesome in clinical practice

Cardiac magnetic resonance imaging (MRI) have greater reproducibility in evaluating left ventricular ejection fraction (LVEF). This technique provides morphological, functional, perfusion, and viability information in one assessment. It is expensive and time consuming but id the diagnostic method of choice for patients with technically limited images from ECG and in patients with discordant information that is clinically significant from prior tests

Clinical Trial Description

Current standard of care for patients while on adjuvant trastuzumab is baseline ECHO are as follows:

Patients on one of the above medications should undergo regular monitoring of the heart function during treatment as the following:

1. Baseline evaluation of LVEF prior inhibitor of therapy

2. Serial assessment of LVEF using the same modality.

There is no clear international guidelines on the frequency and method of LVEF assessment.

Cardiac function is usually measured by using (ECHO) echo cardiography and multiple-gated acquisition (MUGA) The patient should be assessed with the same techniques during treatment to avoid stressing the myocardium by the use of exercise or ionotropic agent, before measuring LVEF to prevent earlier evidence of cardiotoxicity. Changes in the early atrial (E/A) filling ratio reflect ventricular compliance and may predict diastolic dysfunction and so decline in LVEF.

Diastolic dysfunction seems to be predictive of cardiac morbidity and mortality.

Trials with adjuvant trastuzumab use the rules for stopping cardiotoxic agents. They identified subset of high risk patients by one or two of the following three criteria:

1. A decline with 10% or more in absolute LVEF from a normal base line to 50% or less

2. a high cumulative dose of Doxorubicin ( > 450 mg/m2 ) and / or;

3. abnormal baseline LVEF < 50% Patients who stopped taking doxorubicin after an LVEF decline were less likely to develop congestive heart failure (CHF) than those who did not.

Echocardiography is used regularly to monitor LVEF and is more widely available. The MUGA, in addition it does not expose patients to ionizing radiation but it is operator-dependent but training and use of automation may overcome the variation .

Study Design

Observational Model: Cohort, Time Perspective: Prospective

Related Conditions & MeSH terms

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