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BACTA

Bangladesh Association of Cardiovascular & Thoracic Anesthesiologists

Cardiology Imaging Registries

Transthoracic Echocardiography (TTE)

Standardized diagnostic criteria and perioperative imaging guidelines for non-invasive cardiovascular assessment and real-time hemodynamic monitoring.

Core Modality Overview

Primary Non-Invasive Cardiac Assessment

Transthoracic Echocardiography (TTE) remains the cornerstone of non-invasive cardiac imaging, providing critical qualitative and quantitative data regarding cardiac morphology, continuous valvular kinetics, and global chamber dynamics. Utilizing advanced high-frequency acoustic ultrasound transducers, TTE delivers multi-planar tomographic mapping of the myocardial architecture.

This modality is essential for pre-anesthetic cardiovascular optimization, enabling clinicians to establish precise baselines for ejection fraction (LVEF), regional wall motion abnormalities (RWMA), and sub-valvular structural integrity before shifting patients into cardiac theaters.

Standard Diagnostic Multi-Planes
  • Parasternal Long-Axis (PLAX): Valuation of the proximal aorta, anterior mitral leaflet, and posterior wall kinetics.
  • Parasternal Short-Axis (PSAX): Cross-sectional regional wall tracking at the papillary muscle and apex thresholds.
  • Apical Four-Chamber (A4C): Definitive tracking of left/right ventricular volumetric geometry and stroke volumes.
  • Subcostal Four-Chamber View: Optimal diagnostic gate for pericardial effusions and inter-atrial septal anomalies.
Evidence-Based Protocols

Clinical Indications for TTE

Valvular Heart Disease

Comprehensive quantification of fibro-calcific stenosis and regurgitant jets utilizing color Doppler mapping. Critical for calculating continuous aortic valve area (AVA) and determining surgical intervention windows for native leaflet reconstructions.

Chamber Volumetrics

Quantitative assessment of dilated, hypertrophic, or restrictive cardiomyopathies. Enables tracing of left ventricular end-diastolic volumes (LVEDV) and calculation of globally indexed ejection fraction via Modified Simpson’s biplane rule.

Perioperative Screening

Pre-anesthetic evaluation to rule out sub-clinical systolic or diastolic ventricular failure, pulmonary arterial hypertension (PAH), or occult intra-cardiac shunts, mitigating intraoperative cardiovascular decompensation.

Standard Hemodynamic Quantification Matrix

Core echocardiographic equations used globally by clinical registries to calculate pressure gradients and structural valve areas.

Clinical Assessment Target Standard Echo Equation / Methodology Physiological Normal Range Critical Thresholds
Transvalvular Pressure Gradient Simplified Bernoulli Equation: ΔP = 4v² Varies by valve orifice Mean Gradient > 40 mmHg (Severe AS)
Aortic Valve Area (AVA) Continuity Equation: A₁v₁ = A₂v₂ 3.0 – 4.0 cm² AVA < 1.0 cm² (Severe Stenosis)
RV Systolic Pressure (RVSP) TR Jet Velocity + Estimated RA Pressure < 35 mmHg RVSP > 50 mmHg (Severe Pulm. HTN)
Academic Compliance Registry
Referenced Imaging Guidelines
ASE/EACVI

Chamber Quantification Criteria: Aligned with the American Society of Echocardiography (ASE) and the European Association of Cardiovascular Imaging (EACVI) dynamic consensus ledgers.

AHA/ACC

Valvular Heart Disease Guidelines: Structural threshold criteria calibrated strictly with the current American Heart Association (AHA) and American College of Cardiology (ACC) task force parameters.

Contact

Bangladesh Association of Cardiovascular & Thoracic Anesthesiologists

House 15, Road 6, Block C

Banani, Dhaka 1213

Bangladesh

Email: info@bacta.org.bd

Phone: +880-2-XXXXXXXX

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