CPC Cardiovascular Risk Reduction and Monitoring 1 — Questions and Answers

Question 1: The Framingham Risk Score (FRS) is used in community paramedicine primarily to:

Diagnose acute myocardial infarction in the field
Estimate a patient's 10-year risk of developing atherosclerotic cardiovascular disease (Correct answer)
Calculate the appropriate statin dosage for a patient
Screen for undiagnosed atrial fibrillation

Correct answer: Estimate a patient's 10-year risk of developing atherosclerotic cardiovascular disease

The Framingham Risk Score estimates an individual's 10-year probability of experiencing a cardiovascular event (MI, stroke, angina). Community paramedics use it alongside the Pooled Cohort Equations for primary prevention risk stratification.

The Framingham Risk Score uses age, sex, total cholesterol, HDL-C, systolic BP, BP treatment status, smoking, and diabetes to estimate 10-year cardiovascular event risk. Risk categories: Low (<10%), Intermediate (10–20%), High (>20%). The ACC/AHA Pooled Cohort Equations (PCE) have largely supplanted FRS for clinical decisions, estimating 10-year ASCVD risk (MI + stroke). Community paramedics use risk calculators during home visits to support statin and aspirin therapy discussions with patients and their PCPs. High-risk patients (≥20%) benefit from high-intensity statin therapy regardless of LDL-C baseline.

Question 2: Which of the following lifestyle modifications has the GREATEST evidence base for reducing systolic blood pressure?

Increasing caffeine intake to promote vasodilatation
Dietary Approaches to Stop Hypertension (DASH) diet combined with sodium restriction to <1.5 g/day (Correct answer)
Daily aspirin therapy
Increasing fluid intake to maintain cardiac output

Correct answer: Dietary Approaches to Stop Hypertension (DASH) diet combined with sodium restriction to <1.5 g/day

The DASH diet combined with sodium restriction is the single most evidence-based non-pharmacological intervention for hypertension, capable of reducing systolic BP by 8–14 mmHg with DASH diet and an additional 2–8 mmHg with sodium restriction.

The DASH (Dietary Approaches to Stop Hypertension) diet is rich in fruits, vegetables, whole grains, low-fat dairy, and lean protein, and low in saturated fat, red meat, and sweets. Multiple RCTs demonstrate DASH alone reduces systolic BP by 8–14 mmHg; adding sodium restriction (<1.5 g/day) augments this by 2–8 mmHg, for a combined reduction of up to 11–14 mmHg. Weight loss (1 kg = ~1 mmHg SBP reduction), regular aerobic exercise (4–9 mmHg), and limiting alcohol also reduce BP. Community paramedics deliver individualized DASH diet counseling during home visits, assess sodium intake, and review food labels with patients.

Question 3: A patient has a resting 12-lead ECG showing an irregularly irregular rhythm with absent P waves and variable ventricular response. This pattern is MOST consistent with:

Sinus tachycardia
Atrial fibrillation (Correct answer)
Third-degree heart block
Premature ventricular contractions

Correct answer: Atrial fibrillation

Atrial fibrillation (AF) characteristically produces an irregularly irregular rhythm with absent distinct P waves (replaced by fibrillatory baseline) and an irregular, often rapid ventricular rate — a classic ECG pattern.

Atrial fibrillation ECG findings: (1) Absent distinct P waves — replaced by irregular fibrillatory baseline (f waves), best seen in V1; (2) Irregularly irregular R-R intervals (completely unpredictable — no fixed pattern); (3) Narrow QRS complexes unless aberrant conduction or bundle branch block. Sinus tachycardia has regular rhythm with visible P waves. Third-degree block has regular but dissociated P waves and QRS complexes. PVCs are wide, bizarre complexes interspersed in a regular rhythm. Community paramedics performing 12-lead ECGs during home visits identify undiagnosed AF (a major stroke risk factor) and escalate to the medical director for anticoagulation evaluation using CHA₂DS₂-VASc scoring.

Question 4: The CHA₂DS₂-VASc score is used in patients with atrial fibrillation to determine:

The urgency of cardioversion
The annual stroke risk and need for anticoagulation therapy (Correct answer)
The appropriate heart rate control target
Eligibility for catheter ablation

Correct answer: The annual stroke risk and need for anticoagulation therapy

CHA₂DS₂-VASc calculates annual stroke risk in non-valvular AF patients. A score ≥2 (men) or ≥3 (women) indicates high annual stroke risk and warrants oral anticoagulation therapy.

CHA₂DS₂-VASc score components: CHF (1), Hypertension (1), Age ≥75 (2), Diabetes (1), Stroke/TIA history (2), Vascular disease (1), Age 65–74 (1), Sex category female (1). Maximum score = 9. Annual stroke risk by score: 0 = ~0%, 1 = ~1.3%, 2 = ~2.2%, 3 = ~3.2%, 4 = ~4.0%, 5+ = increasingly higher. Guidelines recommend OAC for score ≥2 (men) or ≥3 (women). Community paramedics calculate CHA₂DS₂-VASc for newly identified AF patients during home visits and communicate to the care team. They also verify anticoagulant adherence and monitor for bleeding complications in patients on warfarin or DOACs.

Question 5: A community paramedic is monitoring a patient on warfarin (Coumadin). The patient reports taking naproxen OTC for knee pain. The community paramedic should FIRST:

Advise the patient to stop warfarin immediately
Educate the patient about the drug interaction risk, check current INR, and contact the prescribing provider (Correct answer)
Recommend switching to aspirin as a safer alternative with warfarin
Document the finding and defer to the next clinic visit

Correct answer: Educate the patient about the drug interaction risk, check current INR, and contact the prescribing provider

NSAIDs like naproxen increase bleeding risk in warfarin patients through antiplatelet effects and GI mucosal damage. The community paramedic should assess current INR, educate the patient about the interaction, and immediately notify the prescribing provider for guidance.

Warfarin drug interactions are clinically critical. NSAIDs (ibuprofen, naproxen, aspirin) interact with warfarin through multiple mechanisms: (1) inhibit platelet aggregation (additive bleeding risk); (2) displace warfarin from plasma protein binding, transiently elevating free warfarin levels; (3) cause GI mucosal damage, increasing bleeding risk. The combination of anticoagulation + antiplatelet effect significantly elevates major GI bleeding risk. Community paramedics performing medication reconciliation identify OTC NSAID use as a critical drug interaction requiring provider notification. Acetaminophen is generally preferred for analgesia in anticoagulated patients, though high doses also transiently increase INR.

Question 6: Which peripheral arterial disease (PAD) symptom pattern is described as reproducible leg pain or cramping that occurs with exertion and resolves with rest?

Critical limb ischemia
Intermittent claudication (Correct answer)
Acute limb ischemia
Restless leg syndrome

Correct answer: Intermittent claudication

Intermittent claudication is exertional ischemic pain in the lower extremities (typically calf) that resolves predictably with rest. It results from insufficient arterial blood flow to meet muscle oxygen demand during exercise.

Intermittent claudication is the classic presentation of stable PAD. Pathophysiology: during exercise, muscle O2 demand exceeds the delivery capacity of stenosed arteries, causing anaerobic metabolism and pain. Rest reduces demand, restoring perfusion and relieving pain within minutes. Claudication distance (the walking distance at which pain occurs) decreases as disease progresses. Critical limb ischemia (CLI) presents with rest pain, non-healing ulcers, or gangrene — indicating severe, limb-threatening PAD. Community paramedics assess claudication distance, ankle-brachial pressure index (ABI), wound status, and risk factor control (smoking cessation, antiplatelet therapy, statins) in PAD patients.

CPC Cardiovascular Risk Reduction and Monitoring 1

The Framingham Risk Score (FRS) is used in community paramedicine primarily to: