CCI MEGA REVIEW

Which congenital heart defect is most strongly associated with Trisomy 21?

Complete Atrioventricular (AV) Canal Defect.

What components are involved in Complete Atrioventricular Canal Defect?

An ostium primum ASD, an inlet VSD, and a common, single undivided AV valve.

What is the blood supply of the Posteromedial Papillary Muscle?

Single supply from the PDA, making it highly vulnerable to ischemia.

What is the blood supply of the Anterolateral Papillary Muscle?

Dual supply from the LAD and LCx, making it more resistant to rupture.

What is the formula to calculate Right Ventricular Systolic Pressure (RVSP) across a VSD?

RVSP = Systolic Blood Pressure (SBP) - 4(V_VSD)^2.

Which cardiac chambers are first affected by chronic small VSDs?

The Left Atrium (LA) and Left Ventricle (LV).

How do you differentiate Constrictive Pericarditis from Restrictive Cardiomyopathy using Tissue Doppler?

Constrictive Pericarditis has normal or elevated e' velocity; Restrictive Cardiomyopathy has severely depressed e' velocity.

What unique echocardiographic feature differentiates Fabry Disease from other causes of LVH?

Distinctly hyperechoic endocardial lining and prominent papillary muscles.

What are the classic diagnostic echo criteria for Amyloidosis?

Granular myocardium, severe concentric wall thickening, E/A >= 2.0, e' < 8 cm/s, and significant biatrial dilation.

What are the DeBakey Classifications for aortic dissections?

Type I: Proximal ascending to descending; Type II: Confined to proximal ascending; Type III: Confined to descending/abdominal.

What is Eisenmenger Syndrome?

A condition where long-standing left-to-right shunts cause right-sided pressures to exceed systemic pressures, reversing shunt direction.

When does the Mitral Valve close relative to the EKG?

About midway through the QRS complex.

When does the Aortic Valve open relative to the EKG?

Approximately 30-35 ms after the completion of the QRS complex.

Where should an Impella device be positioned on a 2D echo?

Inside the Left Ventricle cavity, approximately 3.5-4.5 cm below the aortic valve annulus.

How do you evaluate the frequency of Aortic Valve opening in a patient with LVAD?

Use M-mode across the aortic valve.

What is the timing and location for pre-op TAVR LVOT diameter measurements?

Measured during mid-systole, parallel to the valve plane, within 2-10 mm of the aortic annulus.

What structural abnormalities are associated with a Primum ASD?

Strongly associated with a cleft mitral valve.

What is the protocol for establishing a true positive shunt in a PFO study?

Inject agitated saline via the left arm and check for bubbles entering the LA within 1 to 3 cardiac cycles.

How do you reduce microbubble shadowing during a UEA exam?

Reduce the infusion rate or apply a 'burst/flash' frame.

Why does significant Aortic Insufficiency cause an overestimation of Aortic Stenosis?

It creates an LV volume overload, falsely elevating peak velocities across the AV.

What happens if the PW Doppler sample volume is too close to the aortic valve during an LVOT check?

It results in an overestimated Aortic Valve Area (AVA).

Why does 2D planimetry fail when assessing the Mitral Valve Area after a balloon procedure?

Asymmetric, non-planar distortions of the valve orifice make 2D tracing inaccurate.

What does an eccentric line of valve closure on an aortic valve M-mode signify?

It is a classic hallmark of a bicuspid aortic valve.

What is the vena contracta width for severe Mitral Regurgitation (MR)?

= 0.7 cm (>= 7 mm)

What is the vena contracta width for severe Aortic Regurgitation (AR)?

0.6 cm (> 6 mm)

What is the difference between Rejection and Dynamic Range in image contrast manipulation?

Rejection eliminates low-amplitude signals; Dynamic Range adjusts the scale of grays.

What does Threshold (Color Priority) do in color Doppler optimization?

Sets the minimum gray level on the 2D image where color will be displayed.

What is Persistence in color Doppler console optimization?

Controls frame-to-frame averaging over time.

What causes Doppler Cross-Talk (Mirroring) on a spectral tracing?

A Doppler angle close to 90 degrees or scanning adjacent to a highly reflective structure.

How can Doppler Cross-Talk be resolved?

By shifting to a less perpendicular angle or turning down the Doppler gain.

What is Doppler 'Blossoming'?

An artifact where signal overamplification causes echoes to leak outside true velocity boundaries.

How is Doppler 'Blossoming' corrected?

By turning down the spectral Doppler gain until a clear spectral window appears.

Why does placing a color Doppler sample box deep on the image degrade temporal resolution?

Increased depth requires longer time-of-flight for pulses, decreasing Pulse Repetition Frequency (PRF).

What is a 'Pulse Packet' in color Doppler?

The number of ultrasound pulses transmitted per scan line to assess flow velocity.

How does the size of a Pulse Packet affect imaging?

Larger packets improve color flow sensitivity but decrease frame rate and degrade temporal resolution.

What is the safe PT/INR value for clinical screening before interventional procedures?

< 1.5

What is the Continuity Equation for Aortic Valve Area (AVA)?

AVA = (A_LVOT x V_LVOT) / V_AV

What is the formula for the Dimensionless Velocity Index (DVI) for an aortic valve?

DVI = V_LVOT / V_AV

What DVI value indicates severe stenosis in native aortic valves?

< 0.25

What is the formula for Mitral Valve Area (MVA) using Pressure Half-Time?

MVA (cm^2) = 220 / P1/2 (ms)

What is the simplified Bernoulli equation?

Delta P = 4(V)^2

What is the formula to calculate Regurgitant Volume (RVol) using the PISA method?

RVol (mL) = EROA * TVI_MR

What is the equation for estimating Left Atrial Systolic Pressure (LASP) using Mitral Regurgitation?

LASP = Systolic BP - 4(V_MR)^2

What are the quantitative thresholds for Severe Aortic Stenosis (AS)?

Velocity >= 4.0 m/s, Mean Gradient >= 40 mmHg, AVA < 1.0 cm^2

What are the parameters for Severe Aortic Regurgitation (AR)?

Vena Contracta > 0.6 cm, P1/2 < 200 ms, Regurgitant Volume >= 60 mL/beat

What are the quantitative thresholds for Severe Mitral Stenosis (MS)?

Mean Gradient >= 10 mmHg, MVA <= 1.5 cm^2

What are the parameters for Severe Tricuspid Stenosis (TS)?

Mean Gradient >= 5 mmHg, Inflow P1/2 >= 190 ms, TVA <= 1.0 cm^2

What is the IVC size and collapsibility chart for estimating Right Atrial Pressure (RAP)?

IVC

What are the quantitative staging values for Mild Aortic Stenosis (AS)?

Peak Velocity: 2.0-2.9 m/s | Mean Gradient: < 20 mmHg | AVA: > 1.5 cm^2 | Indexed AVA: > 0.85 cm^2/m^2.

What are the quantitative staging values for Moderate Aortic Stenosis (AS)?

Peak Velocity: 3.0-3.9 m/s | Mean Gradient: 20-39 mmHg | AVA: 1.0-1.5 cm^2 | Indexed AVA: 0.60-0.85 cm^2/m^2.

What are the quantitative staging values for Mild Mitral Stenosis (MS)?

Mean Gradient: < 5 mmHg | MVA: > 1.5 cm^2 | PASP: < 30 mmHg.

What are the quantitative staging values for Moderate Mitral Stenosis (MS)?

Mean Gradient: 5-10 mmHg | MVA: 1.0-1.5 cm^2 | PASP: 30-50 mmHg.

What are the diagnostic baseline parameters for Mild Primary Mitral Regurgitation (MR)?

Vena Contracta: < 0.3 cm (< 3 mm) | Regurgitant Volume: < 30 mL | Regurgitant Fraction: < 30% | EROA: < 0.20 cm^2.

What are the diagnostic baseline parameters for Moderate Primary Mitral Regurgitation (MR)?

Vena Contracta: 0.3-0.69 cm (3-6.9 mm) | Regurgitant Volume: 30-59 mL | Regurgitant Fraction: 30-49% | EROA: 0.20-0.39 cm^2.

What are the diagnostic baseline parameters for Mild Aortic Regurgitation (AR)?

Vena Contracta: < 0.3 cm (< 3 mm) | Pressure Half-Time (P1/2): > 500 ms | Regurgitant Volume: < 30 mL | Regurgitant Fraction: < 30% | EROA: < 0.10 cm^2.

What are the diagnostic baseline parameters for Moderate Aortic Regurgitation (AR)?

Vena Contracta: 0.3-0.6 cm (3-6 mm) | Pressure Half-Time (P1/2): 200-500 ms | Regurgitant Volume: 30-59 mL | Regurgitant Fraction: 30-49% | EROA: 0.10-0.29 cm^2.

What are the ASE guidelines for normal Left Ventricular Internal Dimension at End-Diastole (LVIDd) in males vs females?

Males: 4.2 - 5.8 cm | Females: 3.8 - 5.2 cm.

What are the ASE guidelines for normal Left Ventricular Internal Dimension at End-Systole (LVIDs) in males vs females?

Males: 2.5 - 4.0 cm | Females: 2.2 - 3.5 cm.

What is the normal reference range for Left Ventricular Ejection Fraction (LVEF%) by 2D Biplane Simpson rule?

Normal: >= 52% for males; >= 54% for females. (Values between 41-51% indicate mild dysfunction).

What is the normal reference range for Left Atrial Volume Index (LAVI) in both genders?

Normal: 16 - 34 mL/m^2. (Values > 34 mL/m^2 indicate left atrial enlargement).

What is the normal limit for Left Ventricular wall thickness (Septum and Posterior Wall) at end-diastole?

Males: 0.6 - 1.0 cm | Females: 0.6 - 0.9 cm. (Values >= 1.1 cm indicate hypertrophy).

What is the ASE upper normal limit for Right Ventricular (RV) Basal Diameter in the Apical 4-Chamber view?

4.1 cm. (Values > 4.1 cm indicate right ventricular dilation).

What is the cutoff value for normal Right Ventricular Systolic Function via TAPSE and Tissue Doppler S' wave velocity?

TAPSE: < 1.7 cm (< 17 mm) indicates dysfunction | RV S' Velocity: < 9.5 cm/s indicates dysfunction.

While scanning a 2D image, you switch from a 3 MHz to a 5 MHz transducer without altering your depth setting. Which probe has the higher Pulse Repetition Frequency (PRF)?

They have the exact same PRF. In standard 2D grayscale imaging, PRF is determined solely by the imaging depth you set, not the frequency of the crystal.

You shift from a 5 MHz transducer to a 2.5 MHz transducer. How does this structural change affect the wavelength of the sound beam?

The wavelength doubles. Wavelength and frequency are inversely proportional. Cutting the frequency in half forces the physical wavelength to double in size.

Where is the ideal position to place your focal zone relative to the specific structural pathology you are evaluating?

Just below (slightly deeper than) the area of interest. The ultrasound beam reaches its narrowest width at the focal point, providing the highest lateral resolution right where your structure sits.

What is the proper workflow for optimizing your Color Doppler Gain settings on the console?

Turn the color gain up until background noise/speckle artifact (blossoming) appears across the sector, then slowly dial it back until just below that specific artifact threshold.