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Short Summary
Main recommendation: Get new-onset chest pain evaluated immediately, and manage the risk factors that make arterial plaque rupture, because a plaque that cracks can clot and cause a heart attack even when the blockage was previously minor. Dr. Jamnadas explains that most plaque grows on the outside of the artery, that a stress test only detects blockages above 70 percent, and that a calcium score helps reveal disease that a stress test can miss.
Key Points
- Dr. Jamnadas explains that most arterial plaque builds up on the outside of the artery wall, not the inside, which makes the artery swell, citing autopsy studies and CT scans.
- A narrowing below 70 percent generally does not restrict blood flow, so a normal stress test does not rule out plaque or future risk.
- A low-grade plaque can crack, form a clot, and suddenly seal the artery, which is how a heart attack happens in someone who previously had no symptoms.
- New-onset chest pain (unstable angina) signals a possible new blockage, so it needs same-day evaluation with stress testing, EKG, calcium scoring, and CT angiogram.
- Risk factors that predispose plaques to rupture include hyperinsulinemia, diabetes, high blood pressure, low HDL, high triglycerides, a sugar-rich diet, obesity, and inflammatory diseases such as inflammatory bowel disease, inflammatory skin disease, and connective tissue disease.
Details Worth Noting
- Concrete instructions: Seek immediate evaluation for any new-onset chest pain, since it may indicate a new blockage. Ask for a stress test, EKG, calcium scoring study, and CT angiogram to determine whether a blockage exists and why EKG changes are present. Screen for the rupture-risk factors listed above (blood sugar and insulin status, blood pressure, HDL, triglycerides, diet, weight, and inflammatory disease). If a calcium score is high but the stress test is normal, treat the patient as having extensive disease that is not yet obstructive, and work to identify and lower inflammatory markers to stabilize the plaque.
- A non-STEMI (mini heart attack) shows positive troponin and ST depression on EKG rather than the ST elevation seen in a classic heart attack; history, exam, EKG, and enzymes can distinguish these scenarios.
- A 50 percent narrowing generally does not restrict circulation by itself, but after a plaque ruptures and clots over it, it may progress to a 70-80 percent blockage over time.
- Dr. Jamnadas says a stent is most likely needed when chest pain and EKG evidence show an actual heart attack, with final decisions based on test results.
- Dr. Jamnadas notes that calcium on a scan does not automatically mean the plaque will rupture, and that prevention can stabilize it.
Bottom Line
A normal stress test does not prove the arteries are clear; plaque can be present and still rupture, so new chest pain should never be dismissed and risk factors should be controlled early.
