Dr James Thompson joins me for a practical conversation about why heart disease still leads as a global killer, why cholesterol and calcium scoring have limits, and how advanced imaging is changing prevention. We also cover exercise, lifestyle, and the role AI is starting to play in cardiac imaging.

Heart disease often starts silently years before a scan or cholesterol test raises the alarm. Dr. James Thompson reveals why a zero-calcium score can still miss dangerous plaque, and why the future of prevention may depend on looking much earlier, and much deeper. We break down the limits of total cholesterol, LDL, and calcium scoring, then show how APO B, LP little A, CT coronary angiography, and cardiac MRI change the picture. If you have ever been told you are "fine" because your cholesterol is normal or your calcium score is low, this conversation will make you rethink what that actually means.

Key topics

• Heart disease remains the biggest killer
• Dr Thompson explains why cardiovascular disease is still the number one public health issue and why it affects men and women differently, especially after menopause.
• Why cholesterol is only part of the picture
• They discuss why total cholesterol and LDL can miss risk, and why APO B and Lp(a) can be more useful markers in specific cases.
• What a calcium score can and cannot tell you
• A calcium score detects calcified plaque in the coronary arteries, but it can miss non-calcified, high-risk plaque.
• The problem with false reassurance
• A zero calcium score does not always mean zero disease, especially in younger people or those with early, vulnerable plaque.
• Why CT coronary angiography is more revealing
• Dr Thompson explains how contrast-enhanced CTA can show the actual coronary arteries, plaque burden, plaque composition, and flow-related risk.
• How CT imaging works in practice
• They cover heart-rate control, breath-holding, EKG gating, IV contrast timing, and why coronary CTA is technically demanding but highly informative.
• MRI of the heart brings different strengths
• Cardiac MRI is described as the best tool for tissue characterization, function, fibrosis, and flow, while CT still wins for spatial resolution of the coronary arteries.
• Exercise and movement are part of prevention
• Paul and Dr Thompson connect imaging with lifestyle, arguing that inactivity is not neutral and that movement is fundamental to cardiovascular health.
• AI is accelerating cardiac imaging
• Dr Thompson explains how AI is helping quantify plaque, flow, and inflammation, and why radiology is one of the main areas where AI is already being applied.
• Why early detection matters
• The conversation repeatedly returns to prevention, especially for people in their 30s, 40s, and 50s who may feel well but already have disease.

Timestamps

(01:36) Dr Thompson’s background in radiology and cardiovascular imaging
(06:43) Why no imaging test is perfect and what each modality does best
(09:16) Why MRI found the injury that X-ray and ultrasound missed
(11:49) Cholesterol as a screening tool and its limitations
(16:45) APO B and Lp(a) as more useful markers for some patients
(18:18) What a calcium score actually measures
(20:31) Why calcified plaque is different from vulnerable non-calcified plaque
(23:27) Why a zero calcium score can still miss dangerous disease
(29:53) How calcium scoring lost ground to contrast CT angiography
(33:14) What contrast-enhanced CTA reveals about plaque burden and composition
(35:04) How coronary CTA is performed, including heart-rate control and breath-holding
(37:49) How AI is being layered onto CT imaging
(40:25) Why CTA can see both inside and outside the coronary artery
(41:37) The heart as a pump and why the coronary arteries are so important
(44:08) Why stenting and bypass are not perfect solutions
(46:19) Exercise as prevention and inactivity as an active problem
(49:22) The Dallas bed rest study and how quickly the heart can decondition
(53:23) Why vigorous exercise may be far more protective than light movement
(55:06) What “lung burn” means in Dr Thompson’s training language
(57:18) What cardiac MRI adds beyond CT
(60:36) Paul’s own cardiac imaging story and how MRI found scar tissue
(63:55) Why coronary CTA is now a class 1A test for low-risk patients with no known disease
(69:48) What’s next for AI, plaque characterization, and inflammation imaging
(74:23) Why prevention is cheaper, easier, and more effective than late-stage treatment

Action items

• Ask your doctor whether your current heart-risk assessment is enough for your age, family history, and symptoms.
• Consider whether cholesterol alone is giving you a false sense of reassurance.
• If you have questions about calcium scoring or CTA, discuss the difference with a clinician who understands cardiac imaging.
• Treat exercise and daily movement as non-negotiable parts of heart prevention.
• If you are in your 30s, 40s, or 50s, do not assume heart disease is a problem for later in life.

Resources

Website - https://drjamesthomps.com/

LinkedIn - https://www.linkedin.com/in/drjamesthomps/

X - https://x.com/DrJamesThomps

Facebook - https://www.facebook.com/drjamesthomps

YouTube - https://www.youtube.com/@gamingcardiaccta

Instagram - https://www.instagram.com/drjamesthomps

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