Calibrated Signal — Hard science. Honest signal.

Topic

Diagnostic Toolkit

What the tests can and cannot see. Why standard cardiac workups miss subclinical disease, what CCTA and calcium scoring actually measure, and how to advocate for the right scan.

3 articles

Hero image for "The Fight for My Own Coronary Artery Scan: Why the System Fails Its Hardest Cases" — Calibrated Signal evidence-first analysis.
Diagnostic ToolkitPatient Advocacy

The Fight for My Own Coronary Artery Scan: Why the System Fails Its Hardest Cases

I’d already been through the full workup. 12-lead ECG. Echocardiogram. Holter monitor. Nuclear stress test. All normal. All clean. A coronary CT angiogr…

Mar 30, 2026 · 12 min read
Hero image for "I Aced Every Cardiac Test. I Still Had an 80% Blockage." — Calibrated Signal evidence-first analysis.
Diagnostic ToolkitPatient Advocacy

I Aced Every Cardiac Test. I Still Had an 80% Blockage.

I run 12-lead ECGs on patients every shift in the ER at Mayo Clinic. Mine came back textbook. So did my echo. So did my Holter. Meanwhile, the ACC, AHA,…

Mar 29, 2026 · 15 min read
Hero image for "I Had an 80% Coronary Blockage at 44. Every Test Said I Was Fine." — Calibrated Signal evidence-first analysis.
Patient AdvocacyDiagnostic Toolkit

I Had an 80% Coronary Blockage at 44. Every Test Said I Was Fine.

My name is Nick Hanson. I’m a former health and wellness industry CEO turned clinician-scientist. I’ve been from the boardroom, to the bench, to the bed…

Mar 24, 2026 · 11 min read