Test 2- Cardiac/GI/Hematological Flashcards
Normal BP: ___-___ mm Hg (systolic)
___-___mm Hg (diastolic)
100-120 mm Hg
60-80 mm Hg
Do NOT begin exercise if SBP < __ or > ___
or if DBP > ___
No exercise if SBP <60 or > 200
Or if DBP >110
Normal BP response during activity:
SBP INCREASES __ mm Hg per MET, DBP ___ change or slight ____.
SBP increases 10 mm Hg per MET
DBP no change or slight decrease
*Stop exercise if drop in SBP or if no increase in SBP with workload or SBP >200
Or if DBP rises above 110 mm Hg (Abnormal responses during activity)
Normal Resting Heart Rate:
__-__ bpm
Bradycardia: < __ bpm
Tachycardia: > ___ bpm
60-100
<60 (Brady)
> 100 (Tachy)
Resting RR: __-___ br/min
- May INCREASE __-__ br/min during ex in healthy adult
- Resting RR > ___ : DO NOT start exercise
- Resting RR __-__ br/min : Use caution
12-20 br/min
May increase 50-69 br/min during ex
> 45 DO NOT EXERCISE
35-45 br/min USE CAUTION
SpO2: __-__%
*
90-100%
<90% acutely ill pt, STOP EX
<85% w chronic lung dz, STOP EX
The cardiovascular system consists of the ___, ____, ____, ____, and ____.
Heart, arteries, capillaries, veins, and lymphatics
The functions of the heart are to:
2
Pump oxygenated blood into the arterial system, which carries it to the cells
Collect deoxygenated blood from the venous system and deliver it to the lungs
The heart is located in the middle of the ______.
It beats approximately ___ times per minute and pumps more than __ liters of blood per minute
Mediastinum
72 times per minute
5 L of blood per minute
What is the two layered sac that encloses the heart called?
Pericardium
What is the purpose of pericardial fluid?
To reduce the friction produced by the pumping action of the heart and cushion the heart against external trauma
There are three layers of cardiac tissue:
___ outer- (same structure as visceral pericardium)
___ middle- (contracting mm of heart)
___ inner- (consists of endothelial tissue)
Epicardium
Myocardium
Endocardium
What arteries are the blood vessels which nourish the heart with oxygen and nutrients? Where do these arteries lie?
Coronary arteries;
they lie on the surface of the heart and arise from the aorta
Diastolic BP must be at least ___ mm Hg to enable adequate blood flow through coronary arteries
60 mm Hg
The conduction system asked to spread the action potential initiated in one area of the myocardium throughout the whole heart. The spread of the action potential stimulates the contraction of the chambers of the heart. The conduction system consists of ___ node, ___ node, ___ ___ ___, and ____ ____.
SA (Sinoatrial) node
AV (atrioventricular) node
Bundle of HIS
Purkinje’s fibers
Heart rate controlled by the _____ nervous system
Autonomic
Def: Often referred to as the pacemaker of the heart; initiates each heartbeat and consists of two types of specialized cells, P and T cells.
__ cells initiate electrical impulses
__ cells transmit impulses
SA node
P cells initiate
T cells transmit
Located in the lower aspect of the atrial septum; receives electrical impulses from the SA node
AV node
What fuses with the AV node to form another pacemaker site, meaning that if the SA node fails this will sustain a heart rate of 40 to 60 bpm?
Bundle of HIS
These are conducting strands on the endocardial surface, penetrating the myocardium of both ventricles. They spread the wave of depolarization.
Purkinje fibers
Def: The atherosclerosis affecting the arterial circulation
Cardiovascular disease
Def: The atherosclerosis (plaque formation) specifically affecting the coronary arteries (Includes angina pectoris, MI, silent myocardial ischemia and sudden cardiac death)
Coronary Artery Disease (CAD) or Coronary Heart Disease (CHD)
(Description of a disease)
When the coronary arteries become narrowed and blocked, the area of the heart that they supply becomes ischemic and injured, and an infarction may result.
Coronary artery disease
**remember that ischemia is the underlying issue that leads to infarction
Def: Irreversible tissue damage due to the lack of oxygen
Infarction
Name the 4 valves of the heart:
Tricuspid, Bicuspid (Mitral), Aortic, and Pulmonic Valves
The atherosclerotic (plaque build up) process leads to ____ and ____ of the heart tissue. Eventually scar tissue will be formed which does not contribute to _____ (get narrowing and stiffness).
Ischemia and necrosis
Does not contribute to contractility
Atherosclerosis and arteriosclerosis are different in that:
Athero- plaque formation
Arterio- plaque and hardening of arteries
(Atherosclerosis)
Plaque in vessels can cause bleeding, ___ formation, and distortion or rupture of blood vessels. ___ ____ and ____ are the most sudden and often fatal signs of the disease.
Before actual scar formation occurs the weakened area is susceptible to ____ development.
Clot formation
Heart attacks and strokes
Aneurysm
*Excessive localized enlargement of an artery caused by weakening of the arterial wall
CAD Is a progressive disorder which if not prevented or treated in the early stages can lead to sudden cardiac death, angina pectoris, conduction disturbances, and myocardial infarction. Prevention is the best medicine, reduce ___ intake, also medication can be given to reduce ____ levels and prevent clot formation.
Fat intake
Cholesterol levels
Name some risk factors in which alleviating has been shown to reduce the incidence of CAD:
Smoking
Elevated total serum cholesterol level
Elevated LDL cholesterol level
Hypertension
Def: A surgical technique in which a balloon-tipped catheter is inserted into a blocked artery to compress the plaque and open the artery. It is thought that the force of dilation on the obstruction compresses it and flattens it out, which opens the lumen and permits an increase in blood flow. This process only eases the symptoms but does not halt the process.
PTCA - Percutaneous Transluminal Coronary Angioplasty
Name the three conditions that are due to insufficient blood supply to the myocardium and are collectively referred to as “coronary artery disease”
Angina Pectoris
Congestive heart failure
Myocardial infarction
Thrombus: When there is plaque built up on the arterial wall and the blood flow is slowed a clot may form. When the blood vessel becomes blocked by the thrombus this is called ____.
Thrombosis
*A coronary thrombosis is a clot or thrombus in a coronary artery. A coronary thrombosis will often result in a heart attack
Def: A sudden constriction of a coronary artery whereby the blood flow is decreased or cut off. A brief one may cause only mild symptoms, but a prolonged one can cause irreversible damage such as infarct.
Spasms
Def: Chest pain resulting from ischemia to a part of the myocardium. It is acute pain that results from the imbalance between cardiac workload and oxygen supply to the myocardial tissues. It is usually a clinical symptom accompanying arteriosclerotic heart disease. It may also be produced by coronary spasms or by aortic stenosis or insufficiency.
Angina Pectoris
Angina attacks are frequently triggered in susceptible individuals by any condition which increases myocardial oxygen demand: such as stress, eating, exertion, or even extremes of temperature and humidity.
Signs and symptoms include: ____, ____, and ____ in the chest that may radiate to the ____ shoulder and down the inside of the arm to fingers.
Usually last less than __ minutes and not more than __ minutes.
Tx- reduce stress, nitroglycerin, surgery, or medication
Burning, squeezing, and tightness
To left shoulder
Less than 15 and not more than 30
Def: Surgical intervention that may not prolong life or reduce the occurrence of myocardial infarction, but it does reduce angina and improve activity tolerance. This type of surgery is often chosen to improve quality of life.
***It is effective treatment for severe coronary disease and the purpose is to increase blood flow to the myocardium.
CABG - Coronary Artery Bypass Graft
What vessels do surgeons typically use during a CABG?
The saphenous vein or the internal mammary artery
*Normal BP <120 SBP and <80 DBP
Elevated: __-___ mm Hg SBP and
< __ mm Hg DBP
Hypertension:
Stage 1-
___-___ mm Hg SBP OR __-__ mm Hg DBP
Stage 2-
> or equal to ___ mm Hg SBP OR > or equal to ___ mm Hg DBP
120-129 SBP and <80 DBP
Stage 1 HN
130-139 SBP OR 80-89 DBP
Stage 2 HN
greater than or equal to 140 SBP OR greater than or equal to 90 DBP
Normal CV response to aerobic exercise:
INCREASED workload = ___ HR, ___ SBP, limited change in DBP and ____ respiration rate.
(Increased or decreased)
Increased for all
Remember just limited change in DBP
For people with history of high BP:
Monitor BP in all adults > __ yo and in younger patients who are obese, have glucose intolerance, diabetes, or renal dysfunction. Monitor both at rest and with activity.
35
Do not begin exercise if SBP > __ mm Hg or DBP > __ mm Hg
If SBP rises > __ mm Hg or if DBP exceeds __ mm Hg terminate exercise.
SBP > 200 or DBP > 110
If SBP rises > 200 or if DBP exceeds 110
Pathology description:
Linked to CAD or ischemic heart disease. When CAD causes an acute problem. Hallmark sign is ischemic chest pain due to discrepancy between myocardial O2 supply and demand. Symptoms do not occur until the lumen is at least 70% occluded.
It encompasses A variety of diagnoses ranging from unstable angina to myocardial infarction to sudden cardiac death.
Acute Coronary Syndrome
Description:
Irreversible changes begin 20 min to 2 hours from onset of myocardial ischemia. Angina usually precedes.
Myocardial infarction
*Zone of injury and zone of ischemia extend beyond the initial zone of infarction thus expanding the impact of an MI and leading to inefficient muscle mechanics
Coronary artery distribution:
The right coronary artery supplies __ and inferior __
RA (right atrium) and inferior LV (left ventricle)
Left anterior descending artery supplies the Anterior rand and septal aspects of the __
Left ventricle
Left circumflex artery supplies the ___ and side and back of ___
Left atrium and back of left ventricle
S&S of ___ (men):
Retrosternal chest pain “elephant sitting on chest”, radiating pain into LUE and L jaw. Dizziness, lightheadedness, weakness, diaphoresis (excessive sweating), fatigue
(Women): Nausea and vomiting, S.O.B, pressure/pain upper abdomen/lower chest, dizziness, upper back pressure, extreme fatigue
S&S of Myocardial Infarction
MI: most deaths occur within first __ hours
12
Medical management of MI:
Pharmacology- Antiplatelets, Anti____, and Anti_____
Revascularization procedures:
___ ____ ___ ___ (PTCA)
-CABG
Antihyperlipidemics, antihypertensives
Percutaneous transluminal coronary angioplasty
“Move in the tube” for post ____
Prevent wound ____ and sternal instability
Sternotomy
Wound dehiscence
Electrocardiogram-
__ wave: atrial depolarization and contraction
P wave
Electrocardiogram-
___ segment: slow impulse conduction from AV done through Bundle of HIS
PR segment
*flat line before QRS complex
Electrocardiogram-
___ complex: ventricular muscle depolarization and contraction
QRS complex
Electrocardiogram-
__ segment: ventricular repolarization
ST segment
Electrocardiogram-
__ wave: later ventricular repolarization
T wave
Normal electrical conduction:
__ node>__ node>_____>Purkinje fibers>septum>ventricles
SA node
AV node
Bundle of HIS
Def: caused by disturbance in the electrical activity of the heart
Arrhythmias
Atrial arrhythmias:
Description- “Saw-tooth” pattern, multiple P waves for every QRS complex resulting in decreased cardiac output
Atrial Flutter
Atrial arrhythmias:
Description- “atria quivering like a bag of worms”, unpredictable conduction of disordered impulses from atrium resulting in ineffectual atrial contractions, decreased cardiac output an increased risk of thrombus formation which may lead to CVA
Atrial fibrillation
Ventricular arrhythmias:
Contraction initiated in ventricle before the normal SA node, may be benign or malignant
PVC (premature ventricular contractions)
STEMI vs. NSTEMI Myocardial Infarction
Which is more severe?
STEMI is more severe, causes more muscle damage, larger blockage
Def: Uses cold or heat to scar region of the heart causing electrical abnormality to block abnormal signals
Cardiac Ablation
Not a disease itself, it is a manifestation of the many cardiac and pulmonary disease processes
Involves systolic and/or diastolic properties result in impaired left ventricular function
Causes: Cardiac muscle dysfunction and/or scarring, hypertension, cardiomyopathy, valvular dysfunction
Heart failure
*When accompanied by signs and symptoms of edema it is referred to as Congestive Heart Failure