review. inferior and superior vena cave ra tricuspid valve pulmonic valve pulmonary artery lungs...
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Review
Inferior and Superior Vena Cave RA Tricuspid Valve Pulmonic Valve Pulmonary Artery Lungs {oxygenation} Pulmonary Vein Left Atrium Mitral Valve Left Ventricle Aortic Valve Circulation
Sodium Enters; Potassium leaves Depolarization
RELATIONSHIP OF THE ECG TO ELECTRICAL EVENTS IN THE HEART
P wave- PR interval- QRS complex - ST segment- TwaveNormal 0.12 – 0.20 morphology normal isoelectric presentUpright <0.12 secondsOnly before each QRS
= NSR
RELATIONSHIP OF THE ECG TO ELECTRICAL EVENTS IN THE HEART
Any deviation from the normal electricalrhythm of the heart
= Dysrhythmia
RELATIONSHIP OF THE ECG TO ELECTRICAL EVENTS IN THE HEART
Causes of dysrhythmias:• MI, ischemia, necrosis• Autonomic nervous system imbalance• Distension of the chambers
notably in the arteries secondary to CHF• Blood gas abnormalities i.e. hypoxia and abnormal pH• Electrolyte imbalances• Trauma {cardiac contusion}• Drug effects and drug toxicity• Electrocution• Hypothermia• CNS damage• Idiopathic events: arising spontaneously or from an obscure or unknown cause
• Normal occurances
RELATIONSHIP OF THE ECG TO ELECTRICAL EVENTS IN THE HEART
The absence of cardiac electrical activity
= arrhythmia
RELATIONSHIP OF THE ECG TO ELECTRICAL EVENTS IN THE HEART
ANALYZING RATE• ECG strip method or 60 second method• “300” method or triplicate method• R-R method
CARDIAC EMERGENCIES
What’s next:• Bringing It Home• Cardiac arrest lecture• Mega code practice and scenarios• Exams
writtenMega code
BRINGING IT HOME
Cardiac Anatomy and Physiology• Flow of blood through the heart and cardiac
conductive system• Composition of Blood
Composition of the Blood
• Plasma• Red blood cells• White blood cells• Platelets
Flow of bloodArteries – arterioles - veinules - veins
Major Blood Vessels• Superior Vena Cava• Carotid Arteries• Jugular Veins• Aorta• Femoral Artery• Inferior Vena Cava• Brachial Arteries
Circulation of Blood between:• Heart and lungs• Heart and rest of the body
• Mechanical and Electrical functions of the heart in relation to pulse and blood pressure
• Shock
Cardiac CompromiseAcute Coronary Syndrome
Syndrome: In medicine and psychology, the term syndrome refers to the association of several clinically recognizable features, signs (observed by a physician), symptoms (reported by the patient), phenomena or characteristics that often occur together, so that the presence of one feature alerts the physician to the presence of the others.
Cardiac Compromise:• Any kind of problem with the heart
• May lead to a high index of suspicion for possible: MI
AnginaCHF
Signs and Symptoms of Cardiac Compromise:• Dyspnea• Pain, pressure or discomfort• Palpations• Sweating• N & V• Anxiety
• Abnormal Pulse• Blood Pressure:
Hypotensive: <90/systolicHypertensive: >150/systolic or
>90/diasolic• Chest Pain
Causes of Cardiac Compromise:• CAD
AtherosclerosisArteriosclerosis
Hardening of the arteries from Ca++ deposits
• Restriction of blood through the arteryThrombus; clot and debris from plaque
Occlusion: Thrombus cuts off blood flow
Embolism: Thrombus that moves to occlude the flow of blood beyond the blockage
Risk Factors:• Heredity• Age• HTN• Obesity• Lack of exercise• Elevated cholesterol and triglycerides• Smoking
• Common SymptomChest Pain
• Aneurysm
Electrical Malfunctions of the Heart• Dysrhythmia
Mechanical Malfunctions of the Heart• Pump Failure
Angina PectorisChest Pain
• Difference between Angina & MI• NTG
• AMISudden death is considered a cardiac arrest
within 2 hrs. of symptomsRisk Factors• CAD• Chronic respiratory problems• Unusual exertion• Severe emotional stress
Treatment• Fibrinolytics• Angioplasty or Catheterization• ASA regimen
CHFLeft sided heart failure/ Right sided failure soon follows
Causes:• Diseased heart valves• HTN• COPD• As a complication of an MI
Pulmonary Edema• Rales• Blood tinged sputum• Pedal Edema• Abdominal Distension
Signs and symptoms of CHFCARDIOGENIC SHOCK
• Tachycardia• Dyspnea• Normal to elevated B/P• Cyanosis• Diaphoresis• Cool Clammy skin
• Pulmonary Edema• Anxiety or confusion due to hypoxia• Pedal edema• JVD (late sign)• ABD distension
Enlarged liver and spleen• Medication History
Lasix
PATIENT CARE• POC• O2• Identify Priority Patient
No history of cardiac problemsHx but no NTGHypotensive
• Transport: Thoughtful, calm, caring fashion
ASSIST with NTG• Clinical signs and symptoms must be present• Right med, route, dose, form, patient• Pulse rate >50 and <100
Protocol• Systolic B/P >110• Has not taken Viagra or such within 48 to 72 hrs.• Medical Control
• Remember usual protocol is 1 does q 5 minutes to 3 doses.
• CHECK BLOOD PRESSURE BEFORE ADMINISTERING
CARDIAC EMERGENCIES
LET’SPLAY