## First-Line Imaging in Suspected Heart Failure ### Why Transthoracic Echocardiography is the Gold Standard **Key Point:** Transthoracic echocardiography (TTE) is the most common and recommended first-line imaging modality for any patient with suspected or confirmed heart failure. **High-Yield:** TTE provides: - Real-time assessment of left ventricular ejection fraction (LVEF) - Differentiation between systolic and diastolic dysfunction - Evaluation of all four cardiac chambers - Assessment of valvular pathology - Estimation of pulmonary artery pressure - Rapid, non-invasive, bedside capability - No radiation exposure - Cost-effective ### Clinical Pearl In a diabetic patient with heart failure symptoms, TTE helps classify the type of dysfunction (HFrEF, HFmrEF, or HFpEF), which directly guides therapeutic decisions including ACE inhibitors, beta-blockers, SGLT2 inhibitors, and aldosterone antagonists. ### Comparison of Cardiac Imaging Modalities | Modality | First-Line? | Indication | Limitation | |----------|-------------|-----------|------------| | **Transthoracic Echo** | **Yes** | Initial assessment, LVEF, valves, diastolic function | Operator-dependent, poor acoustic windows | | Cardiac MRI | No | Tissue characterization, scar, infiltration | Expensive, time-consuming, contraindicated in pacemakers | | Coronary Angiography | No | Therapeutic intervention, CAD assessment | Invasive, radiation, reserved for specific indications | | Myocardial Perfusion Scan | No | Ischemia detection, viability assessment | Radiation, lower sensitivity than angiography | **Mnemonic: ECHO FIRST** — **E**jection fraction, **C**hamber size, **H**ypertrophy, **O**verall function; **F**ast, **I**nvasive-free, **R**epeatable, **S**afe, **T**herapy-guiding [cite:Harrison 21e Ch 233]
Sign up free to access AI-powered MCQ practice with detailed explanations and adaptive learning.