chapter 24, 42 and 47

A TRUE statement regarding pulse pressure is which of the following?

Pulse pressure is an indication of the tone of the arterial walls.

In an ECG which electrode is used for grounding?

RL (right leg)

The amount of blood flow to the myocardium is termed

Perfusion

The most common method of venipuncture is?

Evacuated tube method

Which color tube contains heparin for plasma and whole blood?

Green

Which tube should be drawn first when venipuncture is ordered??

Blood culture

Which size needle is typically used in venipuncture?

20-21

P wave is what?

Atrial depolarization

QRS is what?

Ventricular depolarization

T wave is what?

Repolarization of ventricles

ST segment represent what?

Repolarization of ventricles

If the QRS complex and T wave point opposite directions, what does it mean?

A problem with the heart of its electrical system

What is the PR interval?

Time it takes for impulse to cross atria and atrial ventricular node to reach ventricles

What is a U wave?

Sometimes present, represents further relaxation of ventricles. Continuation of ventricular repolarization

What is an augmented lead?

Record the midpoint between two limb sensors to third limb sensor

How long does a QRS complex last?

0.06 to 0.12 seconds

How long does a QRS complex last?

0.06 to 0.12 seconds

____ is an radioisotope that emits gamma rays and is used in nuclear medicine

Thallium

A nuclear scan to check for blood flow in the myocardium is a ___ scan

MUGA

Movement away from the baseline is called?

Deflection or wave

A normal electrical cardiac cycle (heartbeat) is traced on an ECG as one set of?

PQRST waves

A what wave is an Atrial contraction initiated by the SA node?

P wave

Ventricular contraction is what?

QRS complex

Normal sinus rhythm has what?

P wave, T wave and QRS complex

Which feature on an EXG control panel requires warm up?

Main power switch

What moves the paper at international standard of 25mm/sec

Record switch

What allows control of increase/decrease of record size or enlarge/shrink deflections?

Sensitivity control

What indicated which lead is being recorded?

Marker

V1 placement?

4th intercostal, right of sternum

V6 placement?

Left of midaxillary, horizontal to V4 and V5

What speed is international standards?

25mm/sec

Electrical activity from another non heart source is?

Artifact

What artifact is caused by tense muscle or muscle contraction?

Somatic tremor

Artifact caused by no good skin contact?

Wandering baseline

Loose or broken wires cause what artifact?

Broken recording

Stress tests?

Exercise, pharmacology and nuclear

What is pharmacologic stress test?

Uses heart stimulating meds to mimic effects of exercise

Nuclear stress test works during when?

Both at rest and during activity

While wearing holter monitor what CANT you do?

Shower or bathe

While using Holter monitor, avoid what?

Areas of high voltage

What is a polarized myocardial cell have?

Negative internal and positive external

Calculate estimated HR w ATRIAL contractions? How

Multiply # of P waves across 6 seconds by 10

Calculate HR, divide the mm boxes between 2 QRS complexes with which number?

1,500

ECG looks like teeth on a saw, caused by rapid movement of upper heart chambers. What abnormality is this?

Atrial flutter

Why stress test when ECG is normal?

Exercise stress heart, which can show decreased blood flow we cant see at rest

Both P wave and rhe QRS complex ___?

Represent depolarizatio

Normal ECG will NOT have what?

At least 100 beats per minute

Blank refers to death of hear muscles

Infarction

Ischemia means?

Blood flow or oxygen to a body part is blocked or limited

Hypoxia is?

Body tissues do not get enough oxygen to function

Where is the Bicuspid valve? (Known as what as well?)

Between left atrium and left ventricle. Known as the mitral valve

Heparin (blood specimen additive) does what?

Prevents blood clotting

Regarding aneurysms, which of the following statements is TRUE?

Aneurysms often go undetected

It is FALSE to state which of the following concerning veins

Veins are preferred for palpating pulse rate.

What is the effect of a sudden interruption in supply of blood to part of the brain

Stroke

Which of the following conditions often presents with Angia, or chest pain?

Atherosclerosis

What does the SA node do?

Initiate the heartbeat

Prompting the heart ventricles to contract is the function of what?

Purkinje Fibers

What is name of the function of blood absorbing heat and distributing it?

Regulation

Systemic Circulation is what?

Deliver oxygenated blood and nutrients to body cells

What is Lipofuscin?

Age related pigmentation change to the heart.