Nursing School Stuff - Australia

Cardiovascular Causes of Chest Pain Explained Simply:

Chest pain from heart or blood vessel problems can be serious and life-threatening.

1. Cardiac Tamponade (Fluid buildup squeezing the heart)

• What happens: The sac around the heart fills with fluid (often blood), pressing on the heart so it can’t fill properly.

• Symptoms: Fast heart rate, shortness of breath, low blood pressure, shock; muffled heart sounds.

• Key signs/tests: Low voltage on ECG; enlarged heart shadow on chest X-ray; fluid seen on echo (TTE).

See photos below:

2. Aortic Dissection (Tear in the main artery wall)

• What happens: The inner layer of the aorta (big artery from heart) tears, letting blood split the wall layers.

• Symptoms: Sudden, severe tearing pain in chest radiating to back; high blood pressure; unequal pulses/blood pressure in arms.

• Key signs/tests: Elevated D-dimer blood test; widened aorta on chest X-ray; tear seen on CT or echo.

3. Thoracic Aortic Aneurysm (Bulging in the chest aorta)
• What happens: The aorta wall weakens and bulges like a balloon; can press on nearby areas or rupture.
• Symptoms: Pressure feeling in chest, back pain; worse if rupturing (severe pain, shock).
• Key signs/tests: Abnormal/widened aorta on chest X-ray; seen clearly on CT.

4. NSTEMI/UA (Non-ST Elevation Myocardial Infarction or Unstable Angina – Partial heart attack)

• What happens: Blocked blood flow to part of the heart muscle (but not full blockage).

• Symptoms: Heavy pressure/squeezing in chest, radiating to shoulder/arm; nausea, sweating; may improve with rest/nitroglycerin.

• Key signs/tests: Normal or raised troponin (heart damage marker); nonspecific ECG changes (no big ST elevation).

5. STEMI (ST Elevation Myocardial Infarction – Full heart attack)

• What happens: Complete blockage of a heart artery, damaging heart muscle quickly.

• Symptoms: Similar to NSTEMI but often more intense; heavy pressure, radiation to arm/shoulder, nausea, dizziness.

• Key signs/tests: High troponin; ST elevation on ECG; wall motion issues on echo.

6. Pericarditis (Inflammation of the heart sac)

• What happens: The lining around the heart gets inflamed (often from infection or other causes).

• Symptoms: Sharp chest pain, worse when lying down or breathing deeply; better leaning forward; may hear a rub sound.

• Key signs/tests: Raised ESR/CRP (inflammation markers); ST elevation or PR depression on ECG; fluid on echo.

Important: These conditions overlap in symptoms (e.g., pain radiation, nausea). Always get evaluated with ECG, blood tests, and imaging. Early treatment saves lives!

In medical settings, the term “line” usually refers to various types of vascular access devices (tubes/catheters) inserted into blood vessels or body cavities to administer medications, fluids, blood products, nutrition, or to monitor hemodynamic parameters. Here are the most common types of “lines” used in hospitals:

1. Peripheral Intravenous Line (PIV or IV cannula)
• Short catheter inserted into peripheral veins (usually hand, forearm, or foot).
• Most common, used for short-term (hours to a few days).
• For fluids, medications, some blood draws.
• Not suitable for irritant drugs or long-term use.

2. Midline Catheter
• Longer than PIV (8–25 cm), inserted in upper arm veins, tip sits in larger veins near the shoulder.
• Lasts 1–4 weeks.
• Used when treatment lasts longer than a few days but not long-term.

3. Central Venous Catheter (CVC)
• Long catheter with tip in a large central vein (usually superior vena cava).
• Inserted via neck (internal jugular), chest (subclavian), or groin (femoral).
• Types:
◦ Non-tunneled CVC (temporary, weeks)
◦ Tunneled CVC (e.g., Broviac, Hickman – for months/years)
◦ Implanted port (Port-a-Cath) – totally under skin, accessed with special needle

4. PICC Line (Peripherally Inserted Central Catheter)
• Inserted in arm (basilic or cephalic vein), tip in superior vena cava.
• Can stay for weeks to months.
• Very common for antibiotics, chemotherapy, TPN (total parenteral nutrition).

5. Arterial Line (A-line)
• Catheter in an artery (usually radial, femoral, or brachial).
• Used for continuous blood pressure monitoring and frequent arterial blood gases (ABGs).
• Common in ICU, operating rooms, critically ill patients.

6. Pulmonary Artery Catheter (Swan-Ganz catheter)
• Advanced central line that goes through the right heart into the pulmonary artery.
• Measures cardiac output, pulmonary pressures, mixed venous oxygen.
• Used in severe heart failure, shock, cardiac surgery.

7. Hemodialysis Catheter (Vas-Cath or Trialysis)
• Large-bore, dual/triple-lumen central line (usually neck or groin).
• Temporary access for urgent dialysis.

8. Intraosseous Line (IO)
• Not a vein – needle inserted into bone marrow (usually tibia or humerus).
• Emergency access when IV access fails (especially in children or trauma).

9. Umbilical Catheters (in newborns)
• UAC (Umbilical Artery Catheter) – like an A-line
• UVC (Umbilical Vein Catheter) – like a central line

All central lines (PICC, CVC, etc.) carry risk of central line-associated bloodstream infection (CLABSI), so strict sterile technique and care bundles are essential.

Coronary artery disease, commonly referred to as CAD or heart disease, is the most prevalent type of heart condition. The heart, a muscle requiring oxygen and nutrients to function, receives these essential components through its coronary arteries. Over time, these arteries can become progressively occluded, much like the pipes in an older home that become clogged with rust and grease. The occlusion is comprised of fat, calcium, scar tissue, and other waste products. This accumulation is referred to as plaque. As plaque grows, the artery narrows, restricting blood flow and reducing oxygen supply to the heart, particularly during physical activity or stress. Insufficient oxygen supply to the heart may manifest as chest pain or pressure, shortness of breath, or fatigue. In severe cases, a sudden rupture of the plaque can lead to the formation of a blood clot, completely blocking the artery and causing a heart attack. Anyone can develop coronary artery disease, but certain risk factors increase its likelihood, including smoking, high blood pressure, high cholesterol, diabetes, physical inactivity, a diet rich in fatty and processed foods, obesity, and a family history of heart disease. Fortunately, it is possible to prevent or halt the progression of coronary artery disease through lifestyle modifications, such as adopting a healthier diet, engaging in regular exercise, quitting smoking, and taking prescribed medications. In severe cases, medical interventions like angioplasty, stenting, or bypass surgery may be necessary. In summary, coronary artery disease is a condition characterized by the gradual occlusion of the heart's blood vessels, which can be slowed, halted, or even reversed through healthy lifestyle choices and medical treatment, emphasizing the importance of early detection and intervention.

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Wolff-Parkinson-White (WPW) Syndrome

Quick Revision Notes

Definition
�Congenital accessory pathway (Bundle of Kent) between atria and ventricles → bypasses AV node → pre-excitation.

ECG Classic Triad

1 Short PR interval (110–120 ms)
Types
• WPW pattern: ECG changes only (asymptomatic)
• WPW syndrome: ECG changes + symptomatic tachycardias
Arrhythmias in WPW
1 Orthodromic AVRT (most common, ~70%)
◦ Narrow QRS tachycardia
◦ Impulse ↓ AV node → ↑ accessory pathway
2 Antidromic AVRT (rare, ~10–30%)
◦ Wide QRS tachycardia
◦ Impulse ↓ accessory pathway → ↑ AV node
3 Atrial fibrillation (dangerous)
◦ Very rapid ventricular rates (>200 bpm)
◦ Risk of VF and sudden cardiac death (if accessory pathway has short refractory period)

Symptoms
• Palpitations
• Syncope / near-syncope
• Sudden cardiac arrest (rare but life-threatening in young patients)
Risk Stratification
• High risk for SCD: Short refractory period of accessory pathway (95% success)
• Acute tachycardia:�→ Stable narrow-complex: Vagal maneuvers → Adenosine�→ Unstable or wide-complex: Synchronized cardioversion�→ Avoid AV node blockers (adenosine, beta-blockers, calcium channel blockers, digoxin) in AF + WPW → can accelerate conduction through accessory pathway → VF
Key Red Flag�Pre-excited atrial fibrillation (irregular wide QRS tachycardia with very fast rates) → medical emergency.

Major Complications of Diabetes:

Microvascular (small blood vessel damage)

• Diabetic retinopathy → vision loss, blindness
• Diabetic nephropathy → proteinuria → chronic kidney disease → end-stage renal failure
• Diabetic neuropathy�– Peripheral: numbness, tingling, pain, foot ulcers, amputations�– Autonomic: gastroparesis, erectile dysfunction, orthostatic hypotension, silent heart attacks

Macrovascular (large blood vessel damage – accelerated atherosclerosis)

• Coronary artery disease → angina, myocardial infarction (2–4× risk)
• Cerebrovascular disease → stroke (2–4× risk)
• Peripheral arterial disease → claudication, critical limb ischemia, amputations

Other Important Complications

• Diabetic foot ulcers → infection → gangrene → amputation
• Increased infection risk (UTIs, skin, tuberculosis, etc.)
• Ketoacidosis (mainly Type 1) / Hyperosmolar hyperglycemic state (mainly Type 2)
• Hypoglycemia (from treatment)
• Pregnancy complications (miscarriage, congenital anomalies, pre-eclampsia)
Risk increases with�Poor glycemic control, long duration, hypertension, dyslipidemia, smoking, obesity.

Anatomy & Physiology Quick Revision Sheet
Levels of Organization
Chemical → Cell → Tissue → Organ → Organ System → Organism
4 Primary Tissue Types
1 Epithelial – covering, lining, secretion/absorption
2 Connective – support, protection, storage (bone, blood, adipose, cartilage)
3 Muscle – movement (skeletal, cardiac, smooth)
4 Nervous – communication (neurons + neuroglia)
11 Organ Systems (Quick Functions)
1 Integumentary – protection, temperature regulation, vitamin D synthesis
2 Skeletal – support, protection, mineral storage, blood cell production
3 Muscular – movement, heat production
4 Nervous – rapid control & coordination (brain, spinal cord, nerves)
5 Endocrine – slow chemical control (hormones)
6 Cardiovascular – transport of O₂, nutrients, wastes (heart + blood vessels)
7 Lymphatic/Immune – fluid balance, immunity
8 Respiratory – gas exchange, acid-base balance
9 Digestive – breakdown & absorption of nutrients
10 Urinary – waste excretion, water/electrolyte balance, blood pressure regulation
11 Reproductive – production of offspring
Key Anatomical Terms
• Superior/Inferior – toward/away from head
• Anterior (ventral)/Posterior (dorsal)
• Medial/Lateral – toward/away from midline
• Proximal/Distal – closer/farther from trunk (limbs)
• Superficial/Deep
• Sagittal (midsagittal/parasagittal), Frontal (coronal), Transverse planes
Cell Physiology
• Plasma membrane: phospholipid bilayer + cholesterol + proteins
• Nucleus: DNA → mRNA → protein synthesis
• Mitochondria: ATP production (aerobic respiration)
• Ribosomes: protein synthesis
• Endoplasmic reticulum: Rough (protein), Smooth (lipid)
• Golgi apparatus: packaging & modification
• Lysosomes: intracellular digestion
Homeostasis
Negative feedback (most common): opposes change (e.g., temperature, glucose, blood pressure)�Positive feedback (rare): amplifies change (e.g., childbirth, blood clotting)
Bone Facts
• 206 bones in adult
• Long bones: epiphysis (ends), diaphysis (shaft), metaphysis, medullary cavity
• Ossification: intramembranous (flat bones), endochondral (long bones)
• Bone cells: Osteoblasts (build), Osteocytes (maintain), Osteoclasts (break down)
Muscle Types
• Skeletal: voluntary, striated, multinucleated
• Cardiac: involuntary, striated, intercalated discs
• Smooth: involuntary, non-striated, spindle-shaped
Nervous System Divisions
• CNS: Brain + Spinal cord
• PNS: Cranial nerves (12 pairs) + Spinal nerves (31 pairs)
◦ Somatic (voluntary)
◦ Autonomic
▪ Sympathetic (“fight or flight”)
▪ Parasympathetic (“rest & digest”)
Blood Composition
• Plasma 55%: water, proteins (albumin, globulins, fibrinogen), electrolytes
• Formed elements 45%:
◦ RBCs (erythrocytes) – O₂ transport
◦ WBCs (leukocytes) – immunity
◦ Platelets (thrombocytes) – clotting
Heart & Blood Flow
Pulmonary circuit: Right heart → lungs → left atrium�Systemic circuit: Left heart → body → right atrium�Conduction: SA node → AV node → Bundle of His → Purkinje fibers
Respiratory Volumes
• Tidal volume (TV): 500 mL
• Inspiratory reserve (IRV): ~3100 mL
• Expiratory reserve (ERV): ~1200 mL
• Residual volume (RV): ~1200 mL (cannot be exhaled)
Nephron (Kidney Functional Unit)
Glomerulus → Bowman’s capsule → Proximal tubule → Loop of Henle → Distal tubule → Collecting duct�Filtration → Reabsorption → Secretion → Excretion
Endocrine Glands & Major Hormones
• Pituitary (master): GH, TSH, ACTH, FSH, LH, ADH, Oxytocin
• Thyroid: T3, T4 (metabolism), Calcitonin
• Parathyroid: PTH (↑ Ca²⁺)
• Adrenal cortex: Cortisol, Aldosterone
• Adrenal medulla: Adrenaline, Noradrenaline
• Pancreas: Insulin (↓ glucose), Glucagon (↑ glucose)
Digestive Enzymes
• Salivary amylase → starch
• Pepsin (stomach) → proteins
• Pancreatic amylase, lipase, trypsin, chymotrypsin
• Peptidases, maltase, sucrase, lactase (small intestine)
Quick tip: Use this sheet for last-minute review – focus on bold terms and feedback loops!

Tongue Color and Warning Signs

• Healthy tongue: Pink or light pink with a thin white coating. Surface is moist and slightly rough from papillae.
• Pale or white tongue: Often indicates anemia, low blood iron, poor circulation, or nutritional deficiencies (especially B12 or folate).
• Bright red or strawberry-like tongue: Can signal vitamin B deficiency, scarlet fever, Kawasaki disease, or high fever.
• Yellow coating: Commonly caused by poor oral hygiene, smoking, dehydration, or early liver/gallbladder issues.
• Gray or black hairy tongue: Usually harmless; caused by bacteria or yeast overgrowth, smoking, poor oral hygiene, or certain medications. The papillae elongate and trap debris, making the tongue appear “hairy.”
• Purple or bluish tongue: Suggests poor oxygenation, heart or lung problems, or very low blood pressure.
• Brown or dark patches: May appear in smokers or with heavy coffee/tea consumption; rarely linked to oral cancer.
• White patches that don’t scrape off: Could be leukoplakia (pre-cancerous) or oral thrush (fungal infection).
• Deep red beefy tongue with cracks: Typical of severe B-vitamin deficiency or gluten sensitivity.
When to seek medical attention immediately:
• Sudden color change with swelling or breathing difficulty
• Persistent sores, lumps, or white/red patches that last >2 weeks
• Tongue that turns blue/purple
• Very pale tongue with extreme fatigue or shortness of breath
Regularly checking your tongue in natural light can be an early warning system for underlying health issues.