🫀 Position and surface landmarks.

• Precordium → anterior chest overlying heart & great vessels
• Heart chambers → 4 total: atria (thin, reservoir) + ventricles (thick, pump)
• Great vessels → major arteries & veins attached to heart
• Circulation loops → 🌬️ Pulmonary & 🌍 Systemic

📍 Position of the Heart in the Thorax

• Located in the mediastinum (middle of thoracic cavity).
• Lies between the lungs, behind sternum, above diaphragm.
• Orientation:
• Apex points down, forward, and left.
• Base faces up, right, and posteriorly.
• 2/3 of heart mass lies to the left of midline; 1/3 to the right.
• Extends from 2nd to 5th intercostal space.
• Apical impulse (PMI) → felt at 5th intercostal space, left midclavicular line.

🏛️ External Anatomy (Outside the Heart)

🌐 Great Vessels

• Arteries → Aorta (to body), Pulmonary artery (to lungs).
• Veins → Vena cava (from body), Pulmonary veins (from lungs).

🔬 Internal Anatomy (Inside the Heart)

🏛️ Chambers (4 total)

• Right Atrium (RA) → receives deoxygenated blood from body (via vena cava).
• Right Ventricle (RV) → pumps blood to lungs via pulmonary artery.
• Left Atrium (LA) → receives oxygenated blood from lungs via pulmonary veins.
• Left Ventricle (LV) → thickest wall, pumps oxygenated blood to entire body via aorta.

🚪 Valves (Prevent Backflow)

• Purpose of valves: prevent backflow of blood.
• Unidirectional → only allow forward flow.
• Passive opening/closing → respond to pressure gradients.
• Total: 4 valves
• 2 Atrioventricular (AV) valves
• 2 Semilunar (SL) valves
• Chordae tendineae + Papillary muscles → anchor valve leaflets, prevent prolapse.
• Diastole → valves open → ventricles fill with blood.
• Systole → valves close → prevent backflow into atria.

• Atrioventricular (AV) Valves
• Tricuspid → RA → RV
• Mitral (Bicuspid) → LA → LV
• Semilunar (SL) Valves
• Pulmonic → RV → pulmonary artery
• Aortic → LV → aorta
• Systole → open to eject blood.
• Diastole → closed to prevent regurgitation.

⚠️ No Valves at Venous Entry

• No valves between:
• Vena cava → Right Atrium
• Pulmonary veins → Left Atrium

🧱 Heart Wall Layers

• Endocardium → inner smooth lining of chambers/valves.
• Myocardium → thick muscular layer, does the pumping.
• Epicardium → outer layer covering the heart.
• Pericardium → fibrous sac surrounding & protecting the heart.

⚡ Conduction System (Electrical “Wiring”)

• Sinoatrial Node (SA) → pacemaker, initiates impulse.
• Atrioventricular Node → delays impulse, allows atria to empty before ventricles contract.
• Bundle of His → Bundle Branches → Purkinje fibers → spread signal to ventricles.

• The heart has automaticity → can contract without signals from brain/spinal cord.
• If you remove a heart for a body, it will still keep pumping.
• Contraction triggered by electrical impulses through specialized conduction pathways.

📉 Electrocardiograph (ECG / EKG)

ECG measures electrical activity of the heart.

Each wave corresponds to a conduction event:

• P wave → atrial depolarization (atria contract).
• PR Interval → delay time from atrial depolarization → ventricular depol.
• QRS Complex → ventricular depolarization (ventricles contract).
• T wave → ventricular repolarization (ventricles reset/relax).

📝 Key Point:

• Electrical activity precedes mechanical activity.
• Example: QRS (electrical) comes just before actual ventricular contraction.

⏱️ Cardiac Cycle

💤 Diastole (2/3 of cycle)

• Ventricles relax & fill with blood.
• Protodiastolic filling → early passive filling.
• Atrial systole (atrial kick) → atria contract, pushing last bit of blood into ventricles.

💥 Systole (1/3 of cycle)

• Ventricles contract → blood ejected into pulmonary & systemic circulation.
• Atrial systole occurs during ventricular diastole (important note!).

🎧 Heart Sounds

🔊 First Heart Sound (S1)

• Occurs with closure of AV valves—signals beginning of systole
• Mitral component of first sound (M1) slightly precedes tricuspid component (T1).

🔊 Second Heart Sound (S2)

• Occurs with closure of semilunar valves—signals end of systole.
• Aortic component of second sound (A2) slightly precedes pulmonic component (P2).
• Loudest at base.

🎵 Extra Heart Sounds (No normal)

🔊 Third Heart Sound (S3)

• Occurs immediately after S2.
• Due to ventricles resisting early rapid filling (protodiastole).
• Often heard in conditions like heart failure (“ventricular gallop”).

🔊 Fourth Heart Sound (S4)

• Occurs just before S1 (at end of diastole).
• Due to stiff or hypertrophic ventricle resisting filling.
• Often called “atrial gallop.”

🌊 Murmurs (No normal)

• Gentle, blowing, swooshing sounds on chest wall.
• Caused by turbulent blood flow or abnormal valve function.
• Conditions that produce murmurs:
• ↑ Velocity of blood (e.g., exercise, thyrotoxicosis).
• ↓ Viscosity of blood (e.g., anemia).
• Structural valve defects (stenosis, regurgitation).
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Click for more details

📊 Describing Heart Sounds

• Frequency (Pitch) → high or low.
• Intensity (Loudness) → loud or soft.
• Duration → very short; longer silent periods.
• Timing → occurs in systole or diastole.

✅ Would you like me to also make a quick table with S1–S4 + murmurs (columns: sound, timing, cause, location heard best) for easy memorization in Notion

• Clinical note:
• ↑ Pressure in Left heart → pulmonary congestion (lungs).
• ↑ Pressure in Right heart → jugular vein distention (neck) & abdominal swelling.

💪 Pumping Ability of the Heart

🩸 Cardiac Output (CO)

• Definition: Amount of blood pumped by heart each minute.
• Formula: CO = HR × SV
• HR = Heart Rate (beats/min)
• SV = Stroke Volume (mL/beat)
• Normal CO (resting adult): 4–6 L/min
• Heart adjusts output based on body’s metabolic needs (e.g., exercise, stress, rest).

🧲 Preload (Filling process)

• How much blood fills the ventricles before they contract (end of diastole).
• Frank-Starling Law:
• More stretch → stronger contraction.
• Stronger contraction → higher stroke volume (more blood pumped out).
• Example: more water in a balloon → bigger stretch → stronger release.

🚧 Afterload (Resistance/ pressure)

• How much pressure the heart must push against to get blood out.
• Determined mainly by blood pressure in the arteries.
• Example: pushing a door open against strong wind → harder to eject.
• Primarily determined by systemic vascular resistance (aortic pressure).

🫀 Neck Vessels

🩸 Carotid Artery Pulse

• Direct pathway from heart → brain.
• The carotid artery is a central artery that reflects heart activity (close to the aorta).
• When you assess it, you look at the waveform — how the pulse rises and falls.

👉 In simple terms: carotid pulse goes up fast, peaks smoothly, and comes down gradually with a small notch when the aortic valve shuts.

👩‍🍼 Pregnant Woman

• Blood volume ↑ 30–40% → to meet needs of mother + fetus.
• This ↑ volume = ↑ cardiac output (more blood pumped each minute).
• BUT, arterial BP actually decreases (especially 2nd trimester).
• Why? Peripheral vasodilation (blood vessels relax/expand to handle extra blood).
• Clinical note: Pregnancy creates increased workload on the heart → murmurs or extra sounds may appear.

👵 Aging Adult

• Heart and vessels affected by lifestyle, habits, and diseases.
• Risk factors: smoking 🚬, poor diet 🍔, alcohol use 🍷, lack of exercise 🛋️, and stress 😥.
• These influence risk of coronary artery disease (CAD).
• With age: vessels stiffen, BP may rise, and ability of heart to respond to stress/exercise decreases.

👵 Hemodynamic Changes with Aging

📈 Pressure & Pulse Changes

• Isolated systolic hypertension → systolic BP rises because arteries become thickened & stiff (loss of elasticity).
• Left ventricular wall thickens (hypertrophy) to push against higher resistance.
• Pulse pressure increases (difference between systolic & diastolic widens).
• Resting HR & cardiac output remain the same → no major baseline change.
• Exercise capacity ↓ → heart can’t increase output as efficiently under stress.

👉 Summary: The heart works harder against stiff arteries, but it’s less able to adapt when demand increases.

⚡ Dysrhythmias (Arrhythmias/Abnormal rhythms)

• More common in older adults: supraventricular & ventricular arrhythmias.
• Ectopic beats (extra beats) are frequent → often harmless in healthy elderly.
• But with disease, they can ↓ cardiac output & BP.
• Tachyarrhythmias (fast rhythms) not tolerated well → can cause dizziness, syncope, or heart failure.

📉 Electrocardiogram (ECG) Changes

• PR interval prolonged → first-degree AV block.
• QT interval prolonged → slower repolarization.
• QRS unchanged, but conduction shifts.
• Left axis deviation → due to mild LV hypertrophy or fibrosis.
• Bundle branch block incidence ↑.

👉 Aging conduction system = “wiring slows down.”

❤️ Cardiac Disease in the Aging Adult

• Coronary artery disease (CAD) → leading cause of death in older adults (≈ half of deaths).
• Hypertension & heart failure also become more common.
• Lifestyle habits (smoking 🚬, diet 🍔, alcohol 🍷, exercise 🏃, stress 😥) strongly influence risk.
• Physical activity → even moderate levels significantly reduce risk of CV and respiratory disease death.

👉 Health teaching for older adults = critical: BP control, exercise encouragement, diet improvements, smoking cessation.

🌍 Culture & Genetics in CVD (Cardiovascular disease)

⚠️ Global Impact

• Cardiovascular disease (CVD) = #1 cause of death worldwide.
• Risk and prevalence vary by geography (developed vs developing countries).

👥 Disparities in Risk

• Everyone has some baseline risk, but certain groups carry heavier burden:
• Race / Ethnicity
• Gender / Sex differences
• Socioeconomic status (poverty ↑ risk).
• Education level (less education = higher risk).
• Contributing factor: unequal access to healthcare and preventive services.

🏃 Lifestyle Recommendations (Primary Prevention)

• 🚭 No smoking.
• ⚖️ Maintain healthy weight (avoid obesity).
• 🏋️ Physical activity ≥ 1x per week (ideally more).
• 🥦 Balanced diet (low saturated fat, high fruits/vegetables).

🩺 Key Risk Factors

• Hypertension (HTN) = “silent killer.”
• Smoking.
• High serum cholesterol.
• Low physical activity.
• Sex / Gender differences → men higher risk earlier, women risk rises after menopause.

🗣️ Subjective Data: Cardiovascular System

These are questions to ask patients when assessing for cardiac issues.

🦵 Edema

• Ask:
• Onset & timing (gradual or sudden?).
• Amount & location (ankles, legs, sacrum?).
• Relief (improves with rest, elevation, diuretics?).
• Associated symptoms (SOB, weight gain?).

🌙 Nocturia

• Ask if patient wakes at night to urinate.
• Can be a sign of fluid redistribution in heart failure.

🧾 Cardiac History Questions

• Past history:
• Medical/surgical cardiac history.
• Diagnostic tests (ECG, echo, stress test, cath).
• Family history: genetic abnormalities, early heart disease, sudden deaths.
• Lifestyle (Patient-Centered Care):
• Nutrition 🥦
• Smoking 🚭
• Alcohol 🍷
• Exercise 🏋️
• Medications 💊 (compliance + side effects).

🤰 Pregnant Women

• Hypertension during pregnancy?
• Associated findings → proteinuria, edema, weight gain.
• Symptoms → dizziness, fainting.

👵 Aging Adult

• Medical history: comorbidities (HTN, diabetes, COPD).
• Medication history: Rx, OTC, compliance, side effects.
• Environment: impact on ADLs (independence, fatigue with exertion).

✅ Summary:

Asking the right subjective questions gives you early clues about cardiac dysfunction (angina, heart failure, arrhythmias). You tailor the questions based on age group (infant, child, pregnant, elderly).

📝 Preparation & Equipment

• Patient Position
• Carotid arteries → patient sitting.
• Jugular veins & precordium → patient supine, head & chest slightly elevated (30–45°).
• Privacy → cover breasts when examining women.
• Equipment
• Marking pen ✒️
• Small centimeter ruler 📏
• Stethoscope (diaphragm + bell) 🎧
• Alcohol wipes 🧼

✋ Palpation of Carotid Artery

• Palpate one carotid artery at a time → avoids compromising blood flow to brain (You don’t want the patient to faint, right? right?…).
• Assess:
• Contour → smooth, rapid upstroke.
• Amplitude → normal strength = 2+.
• Findings should be equal bilaterally.

🎧 Auscultation of Carotid Artery

• Purpose: detect bruits (blowing sounds = turbulent flow).
• Technique:
• Keep neck neutral.
• Place stethoscope lightly at:
• Angle of jaw
• Midcervical area
• Base of neck
• ⚠️ Avoid compressing artery → can create artificial bruit or decrease cerebral blood flow.
• Patient instruction:
• Ask patient to inhale, then hold their breath briefly.
• This prevents confusion between breath sounds (tracheal/bronchial) and true vascular sounds.
• Normal finding:
• No sound should be heard.
• Abnormal finding:
• Bruit = a blowing or swishing sound caused by turbulent blood flow.
• Suggests narrowing (stenosis), plaque, or obstruction in the carotid artery.
• ⚠️ Clinical importance: indicates ↑ risk of stroke or vascular disease.
• 👉 Key Point: If you hear turbulence in the carotid artery → it’s not normal. Always document and follow up.

👀 Inspection of Jugular Venous Pulse (JVP)

• JVP reflects central venous pressure (CVP) → gives info about right atrial pressure & heart function.
• Patient position: supine at 30–45° (adjust until pulsations visible).
• Assess:
• Level of pulsations → estimate CVP.
• Distention → indicates ↑ right heart pressure (e.g., heart failure).
• Differentiate jugular vs carotid pulsations by:
• Location
• Quality (wavy vs sharp)
• Effect of respiration
• Palpability (jugular NOT palpable)
• Pressure changes
• Position changes

🫀 Precordium Examination

• Inspection
• Use tangential lighting to highlight chest movements.
• Look for pulsations, lifts, or heaves.
• Palpation
• Apical impulse (PMI) → note location, size, amplitude, and duration.
• Palpate across entire precordium → check for thrills or abnormal pulsations.

✅ Summary:

• Carotid exam → palpate one side at a time, auscultate for bruits.
• Jugular exam → estimate CVP, check for distention.
• Precordium exam → inspect with good lighting, palpate PMI and for thrills.

🎧 Precordium Auscultation

🔹 Auscultatory Valve Areas (not over exact anatomic location, but where sounds are best heard)

• Aortic valve area → 2nd right intercostal space (ICS), right sternal border.
• Pulmonic valve area → 2nd left ICS, left sternal border.
• Tricuspid valve area → left lower sternal border (4th–5th ICS).
• Mitral valve area (apex) → 5th ICS, left midclavicular line.

🧠 Mnemonic

👉 “American People Eat Too Much”

• A = Aortic
• P = Pulmonic
• E = Erb’s Point
• T = Tricuspid
• M = Mitral

👉 Key Point: Sound radiates in direction of blood flow, so you listen in these spots rather than directly over the valves.

🔹 What to Assess

• Rate & Rhythm
• Regular or irregular?
• Normal adult HR = 60–100 bpm.
• S1 & S2
• S1 (lub) → closure of AV valves (best at apex).
• S2 (dub) → closure of SL valves (best at base).
• Extra Heart Sounds
• S3 (ventricular gallop) or S4 (atrial gallop).
• Note timing, intensity, and where best heard.
• Murmurs
• Characterize using:
• Timing (systolic or diastolic).
• Loudness (Grade I–VI).
• Pitch (high, medium, low).
• Pattern (crescendo, decrescendo, plateau).
• Quality (blowing, harsh, rumbling).
• Location (point of maximal intensity).
• Radiation (to neck, axilla, back).
• Changes with position (sitting, leaning forward, left lateral).

✅ Summary:

During precordium auscultation, move systematically through the 4 valve areas, listen for S1/S2, then carefully assess for extra sounds or murmurs using a full description (timing, loudness, quality, location, radiation).

Brother, do you want me to also add a comparison block (

🟦 Cyanosis & Skin Tone Differences

• In light-skinned patients → cyanosis appears as bluish discoloration of skin, lips, and nail beds.
• In dark-skinned patients (e.g., Black Americans) → cyanosis may look grayish or ashen instead of blue.
• Best places to assess:
• Conjunctiva, lips, tongue, mucous membranes, nail beds, palms, and soles (areas where underlying color is easier to see).

👉 Key Point: Always adapt assessment to skin tone differences to avoid missing signs of poor oxygenation.

🧠 Developmental Competence: Pregnant Woman & Aging Adult (with WHY)

🤰 Pregnant Woman

• Vital Signs
• ↑ Resting pulse (+10–15 bpm)
• Why? The heart pumps faster to move more blood and supply oxygen/nutrients to both mother and fetus.
• ↓ Blood pressure (lower than pre-pregnancy)
• Why? Hormones (progesterone) cause vasodilation, lowering systemic vascular resistance.

👵 Aging Adult

• Vital Signs
• ↑ Systolic BP (arterial stiffening)
• Why? Arteries lose elasticity (arteriosclerosis), making it harder for them to expand.
• Widened pulse pressure
• Why? Systolic rises more than diastolic, creating a larger gap.
• Orthostatic hypotension risk
• Why? Slower baroreceptor response → delayed adjustment when standing up.
• Cardiac Structure & Function
• ↑ Left ventricular wall thickness
• Why? Chronic pressure overload from stiff arteries makes the LV muscle hypertrophy (works harder to pump).
• More dysrhythmias (SVT & VT)
• Why? Aging conduction system + fibrosis + fewer pacemaker cells = unstable rhythm.
• ECG Changes
• Age-related conduction changes
• Why? Histologic degeneration (fibrosis, fat deposits, fewer SA node cells) alters electrical activity.

Extra notes: A patient with pulmonary conditions have cardiac conditions..

Read S point in the book.

Extra Information

❤️ Heart Failure

Heart failure (HF) is a complex clinical syndrome that occurs when the heart is unable to pump enough blood to meet the body’s metabolic needs or can do so only with increased filling pressures. It may result from structural or functional cardiac disorders that impair the filling (diastolic dysfunction) or ejection (systolic dysfunction) of blood.

Heart failure can present predominantly on the left side, the right side, or as a combination of both. Recognizing the distinct symptoms is important for assessment and diagnosis.

🔹 Left-Sided Heart Failure

When the left ventricle fails, blood backs up into the lungs, causing pulmonary congestion and reduced systemic perfusion.

🔹 Right-Sided Heart Failure

When the right ventricle fails, blood backs up into the systemic venous circulation, producing congestion in peripheral tissues.

📊 Quick Comparison – Left vs Right HF

💢 Causes of Chest Pain

• Heart: Heart attack (MI), angina
• Lungs: Pulmonary embolism, pneumonia,
• GI tract: GERD (acid reflux), peptic ulcer,
• Musculoskeletal: Costochondritis, rib fracture, muscle strain
• Other: Anxiety, panic attack

💢 Costochondritis

Costochondritis is the inflammation of the costal cartilage that connects the ribs to the sternum (breastbone). It is a common cause of chest wall pain and often mimics more serious conditions such as cardiac pain.

📌 Avoid Blood Pressure Cuff on Side With:

• Dialysis access (fistula/graft)
• Mastectomy with lymph node removal
• DVT in the limb
• Catheters or invasive lines (PICC, central line)