FACTS

Question 1

What wall is spared in HOCM

Answer 1

Basal Inferolateral Wall

Question 2

SAM risk factors

Answer 2

C-sept < 2.5     (Systole) 
AL / PL < 1.3
AL > 2    (measure End Diastole, ME 5 chamber) 
PL > 1.5    (measure End Diastole, ME 5 chamber) 
EDD < 45
LVOT d < 2   (Systole) 
Basal septum > 1.5
Angle < 120

Question 3

Matching Layer

Answer 3

1/4 wavelength

Question 4

Crystal

Answer 4

1/2 wavelength

Question 5

Best Resolution

Answer 5

Axial > Lateral > Elevational

Question 6

PRP

Answer 6

Beginning of one pulse to beginning of next pulse
includes Pulse duration + listening time
Determined by SOURCE

Question 7

PRF

Answer 7

The number of pulses that occur in 1 second, expressed in Hz.
PRF = 1/ PRP
Increase PRF = Increase temporal res
important for NYquist limit
Determined by SOURCE

Question 8

Freq

Answer 8

Cycles per unit time

Determined by SOURCE

Question 9

Period

Answer 9

duration of single cycle
Period = 1 / f
Determined by SOURCE

Question 10

Wavelength

Answer 10

Length of single cylce

MEDIUM + SOURCE

Question 11

Power

Answer 11

rate of energy transfer

Question 12

Intensity

Answer 12

I = Power / Beam Area

Question 13

Pulse Duration

Answer 13

Time the pulse is “on”
PD = Period x’s cycle
SOURCE only

Question 14

nyquist limit

Answer 14

NL = 1/2 PRF

Question 15

CWD freq of US beam is determined by….

Answer 15

freq of electrical current applied to crystal

Question 16

Attenuation

Answer 16

Porportional to freq

Question 17

Remnant of Sinous Venosus

Answer 17

Crista Terminalis

Question 18

IVRT

Answer 18

Shortened in Grade III Diastolic

PROLONGED in Grade I Diastolic