Artmast

Lead was used in paint because it - correct answer Adds durability and serves as a drying agent. Lead is sometimes found in drinking water because lead is in - correct answer Pipe solder and plumbing fixtures. What form of lead is often found in house paint? - correct answer WHITE LEAD How much lead must be present in a painted surface for it to be considered lead-based paint by HUD? - correct answer At least 1 milligram per square centimeter (0.01 kg / m2) The federal agency respons...

Lead-based paint (LBP) - correct answer Any varnish, shallac, or coating that contains either- 1.0 mg/cm2 - 0.5 % by weight - 5000 ppm - Older instruments could not read accurately at 0.7, so the lead standard was updated to 1.0 Dust sample clearance values - correct answer - Floors: 40 μg/ft2 > 10 μg/ft2 (10 μg/ft2 in NY) - Windows: 250 μg/ft2 > 100 μg/ft2 (50 μg/ft2 in NY) - Window wells (troughs): 400 μg/ft2 (100 μg/ft2 in NY) - Samples must be at 1 sq ft > 2 sq ft (can be...

Lithium iodine battery V? - correct answer 2.8V- not used for ICDs due to low peak power. Qmr Lithium Iodine/ silver V? - correct answer 3.2V Qhr- used for ICDS Which is an example of a closed loop sensor? - correct answer myocardial contractility and O2 stat Primary Sensor - correct answer detects changes in normal physiologic responses Secondary - correct answer detects internal changes from exercise- QT MV pH Tertiary - correct answer detects changes as a result of exercise- pi...

Voltage is? - correct answer The electromotive force pushing on electrons If the PM output voltage is 5v and the measured lead resistance is 330 ohms, then the current that flows out of the pacemaker into the heart is? - correct answer 15.15 I=V/R=5V/.33 k ohm If a unipolar lead wire has an insulation break one would expect the resistance to? - correct answer decrease for a wire fracture the resistance? - correct answer increases if the output vlotage of the pacemaker is programmed...

Wenkebach window - correct answer Max tracing interval(in ms) - TARP(in ms) 2:1 Block Point - correct answer 60,000/TARP Basic unit of capacitance - correct answer Farad Function of pacemaker circuitry that allows the pacemaker output pulse to be dissipated quickly maximizing both output and sensing capabilities - correct answer Charge dump Av sequentially paced pts with frequent ventricular ectopy should have what programmed to decrease chance of competition - correct answer Short b...

High response rate patient characteristics - correct answer Female LBBB Non-ischemic HF QRS > 150 ms No MI Low BMI Smaller LA volume CRT class 1 indication - correct answer Must have LBBB and QRS > 150 ms NYHC II, III LVEF < 35% Sinus rhythm CRT class IIa indication - correct answer (3 of 4): LVEF < 35%, LBBB, QRS > 150 ms, NYHA III Will pace more than 40% and LVEF < 35% upgrade CRT class IIb indication - correct answer NYHA I or II if other indicators are tr...

A blockage to which coronary artery can cause AV Block? - correct answer Posterior Descending Artery most commonly supplied by RCA but could be supplied by the circumflex What type of tissue has the longest refractory period? - correct answer Ventricular Is the femoral vein medial or lateral to the femoral artery? - correct answer The femoral vein is medial to the femoral artery At what value is something statistically significant? - correct answer P<0.05 What are the normal cardi...

How many HZ are in bpm? - correct answer 1 HZ is equal to 60 bpm In what relation are the units microamps and milliamps used in terms of equations? - correct answer Microamps is a unit of current drain of battery for battery longevity. Milliamps is a unit for ohms law and the energy equation. In the Ohms law equation, what are the units? - correct answer V=I x R: Volts= mA x kOhms What is the formula for energy? - correct answer E = V x I x PW and can be converted into E = (V^2 x PW)/R....

168. Compared to the the permanent pacemaker, does a temp pacer have constant current or voltage? Also, how much voltage can it generate? 5V or 20V? - correct answer Constant current, 20V. (Doubles 9.5V) 171. Which patient with acute MI is most likely to need a temp pacer? Inferior MI, Mobitz I AV Bock Inferior MI, bundle branch block Anterior MI, Mobitz I AV Bock Anterior MI, bundle branch block - correct answer Anterior MI, bundle branch block Acute BBB post MI should be seen as a war...

SA node --(internodal pathway)-> AV node --> AV bundle --> bundle branches --> purkinje fibers - correct answer what is the order of the conduction system of the heart SVC & IVC ---> RA ---> Tricuspid ---> RV ---> P Valve ---> PA ---> lungs ---> P Veins ---> LA ---> Mitral valve ---> LV ---> Aortic valve ---> Aorta ---> Body - correct answer What is flow of blood through heart Conductivity- cell to cell communication automaticity - sponta...