'My Heart Is Racing' — Two People, Two Endings
Two people drink the same espresso in the same café. An hour later both have a heart rate above 100. A keeps reading the paper: 'strong coffee.' B thinks: 'something's wrong with my heart — arrhythmia? what if I collapse?' Five minutes later B's pulse is 130, breath shallow, hands shaking. A panic attack.
In 1985 Steven Reiss and Richard McNally captured this difference in a single term — Anxiety Sensitivity (AS). Their chapter in Reiss & Bootzin's Theoretical Issues in Behavior Therapy held a simple insight: 'The degree to which one fears anxiety itself varies between people and predicts clinical problems like panic.'
AS Is a Belief, Not a Personality
First, the common confusion. AS differs from trait anxiety:
- Trait anxiety: tendency to experience anxiety often. 'I'm a nervous person.'
- Anxiety sensitivity: meta-cognitive belief that anxiety symptoms (racing heart, dizziness, hyperventilation, intrusive thoughts) are harmful. 'A pounding heart means something is very wrong.'
The first is the frequency of experience; the second is the interpretation of that experience. McNally (2002, Biological Psychiatry) emphasized that this distinction is key to explaining why some people, otherwise normal, collapse suddenly into panic.
From ASI to ASI-3
Reiss, Peterson, Gursky, and McNally (1986, Behaviour Research and Therapy) published the 16-item Anxiety Sensitivity Index (ASI). Items rated 0–4 included 'When my heart beats fast I'm afraid I might have a heart attack.'
But ASI-16 had unstable factor structure. Taylor et al. (2007, Psychological Assessment) revised it into the 18-item ASI-3 with a clean 3-factor structure — now the clinical and research standard.
Three Dimensions Map to Different Disorders
The three ASI-3 subscales lead to different clinical pictures (Smits 2008's 'dimensional specificity').
| AS dimension | Core belief (example) | Feared symptoms | Predicted primary disorder |
|---|---|---|---|
| Physical | 'A racing heart means heart attack' | Palpitations, chest, dizziness, breath | Panic disorder |
| Cognitive | 'Trouble focusing means I'm going crazy' | Intrusive thoughts, dissociation, foggy mind | GAD, depression |
| Social | 'If I blush, people will mock me' | Visible shaking, blushing, sweating | Social anxiety |
Clinicians read the subscale pattern, not just the total. The same ASI-3 total of 30 can mean panic-focused treatment (high Physical) or social-anxiety exposure (high Social).
Schmidt 1997 — Proving Prediction
The pivotal finding wasn't that AS is high in panic patients but that AS predicts future panic in healthy people. Norman Schmidt and colleagues (1997, Journal of Abnormal Psychology) administered the ASI to 1,401 US Air Force Academy cadets before their 5-week Basic Military Training (BMT). None had panic history.
In that natural experiment of stacked physical and psychological stress, high-AS cadets had roughly 6× the rate of spontaneous panic attacks compared with low-AS cadets. The effect held after controlling for baseline trait anxiety. AS was a cognitive vulnerability that amplifies anxious experience into clinical pathology.
A Transdiagnostic Risk Factor
Olatunji and Wolitzky-Taylor (2009, Psychological Bulletin) meta-analyzed 104 studies and confirmed AS is most strongly linked to panic but also significantly to PTSD, social anxiety, GAD, and depression. Norton (2012) and others positioned AS as a transdiagnostic risk factor — cognitive soil common to multiple anxiety and mood disorders, not a marker of one diagnosis.
Important distinctions:
- Health anxiety / hypochondriasis: belief one has a disease. AS = belief anxiety symptoms are dangerous.
- Panic disorder itself: AS is a risk factor; high AS need not meet DSM panic criteria, and panic patients can have normal AS.
- Medical phobias (needles, blood, MRI): different mechanism.
Treatment — AS Is Modifiable
Good news: AS is not fixed personality but modifiable belief.
Schmidt (2007) showed a single-session Anxiety Sensitivity Reduction Training (ASRT) workshop significantly lowers AS. Core elements: (1) psychoeducation that anxiety sensations are normal and harmless ('HR 130 is the same as during exercise'); (2) interoceptive exposure — deliberately raising heart rate (jumping in place), inducing dizziness (spinning), trying voluntary hyperventilation, learning experientially that sensations are safe. This is central to Clark's 1986 cognitive panic protocol.
Smits et al. (2008) mediation analyses of panic CBT showed AS reduction mediates symptom improvement — a rare confirmation of a treatment's 'active ingredient.'
Korean Tools and Research
Korean-language AS measurement is well established.
- Lee Eun-Young (2004, Korean Journal of Psychology) Korean ASI (ASI-K) translated and validated the 16-item original — the clinical standard.
- Seo Jang-Won (2014) validated the Korean ASI-3 (ASI-3-K), confirming the 3-factor structure in Korean samples.
- Cho Yong-Rae (2010) reported the Physical dimension as the key clinical marker in Korean panic-disorder patients.
- Jung Seung-Eun (2018) Korean military-trainee study partially replicated Schmidt 1997 — AS predicted anxiety responses under training stress.
Self-Check (Not a Substitute for Assessment)
Formal scoring belongs to clinicians, but consistently strong endorsement of any of the following suggests elevated AS:
- Physical signals (palpitations, dizziness, breath) instantly trigger 'heart attack / stroke / collapse' thoughts.
- Increased intrusive thoughts or fogginess prompts 'am I going crazy?'
- Blushing, shaking, or sweating in front of others feels 'catastrophic.'
- You avoid caffeine, exercise, spicy food because of body activation (avoidance is the decisive clue).
If so, seek a CBT-trained psychiatrist or clinical psychologist for formal ASI-3 assessment and a treatment plan.
Conclusion: The Threat Isn't the Heart, It's Its Interpretation
Reiss and McNally's 1985 paper drove a small Copernican turn in clinical psychology: panic isn't caused by stronger anxiety, but by how anxiety is interpreted. Thirty-five years later that view is sharper through ASI-3, proven by Schmidt's predictive work, and measurable in Korean. Fortunately AS is a belief, and beliefs can be learned and re-learned. When 'HR 130 is just HR 130, not a danger signal' becomes your own experience, the loop of 'fear of fear' starts to unwind.
