I'll never forget the Saturday morning on call when I was called to a code blue.
As the overhead page broadcast through the hospital, my own heart tightened, squeezed, and pounded. The irony was clear – the cardiologist’s own heart was racing while he prepared to treat someone else's.
Ahead of me lay a full day of consults with patients and their anxious families, yet I couldn't shake the sense that something bad was going to happen.
I knew the research: anxiety disorders increased the risk of cardiovascular events. But knowledge didn't stop my sympathetic nervous system from firing.
And here’s what I know now: Fear is essential. It keeps us safe from real danger. But when fear becomes chronic anxiety, it can compromise the very cardiovascular system it evolved to protect.
I’m happy to report I’ve since learned to work with and skillfully navigate my tendency toward worry and anxiety.
I’ve spent over 10,000 hours over the last 15 years studying and practicng ways to work with anxiety, rewire my brain, and experience my life in a completely different way.
And my patients, family, and friends have noticed.
As we continue exploring the nine Heart Breakers, remember that in a future series we will explore a complementary set of emotions and states — the Heart Wakers.
Today we look at anxiety and panic, and consider their opposite: inner peace, the capacity to remain grounded and centered no matter what comes.
The Hidden Epidemic
If you’ve experienced anxiety, you are not alone.
Nearly 32% of Americans will experience an anxiety disorder at some point in their lives, making it the most common mental health condition worldwide. Every year 19% of adults struggle with anxiety. As you meet people today remember that nearly 1 in 5 of us are walking around with that familiar knot in the stomach, racing thoughts, or sense of impending doom.
Women experience anxiety disorders at twice the rate of men, and the numbers are climbing, especially among young adults. The COVID-19 pandemic pushed anxiety rates up by 25% globally, with millions more people suddenly understanding what it feels like when worry takes over.
Those who don’t quite get it believe that anxiety is just "in your head." It’s definitely not. It's a whole-body experience that can stress your heart over time.
When Normal Worry Becomes Something More
We all worry sometimes – that's perfectly normal.
But anxiety disorders are different. They involve excessive fear or worry that lasts for months, interferes with daily life, and feels impossible to control.
Think of normal worry like a car alarm that goes off when someone tries to break in. Anxiety disorders are like that same alarm going off every time a leaf touches the windshield. The warning system meant to protect us becomes so sensitive that it sounds alarms for everyday situations.
The most common types include:
Generalized Anxiety Disorder: constant worry about everyday things
Panic Disorder: sudden, intense episodes of fear with physical symptoms
Social Anxiety: overwhelming fear of being judged by others
Specific phobias: intense fear of particular situations or objects
But anxiety disorders are different. They involve excessive fear or worry that lasts for months, interferes with daily life, and feels impossible to control.
When Anxiety Strains the Heart
Science confirms what many patients already feel in their bodies.
Anxiety disorders are associated with a threefold increase in cardiac events. Chronic worry drives up inflammatory markers by 30–50%, similar to the strain caused by smoking. Even between panic episodes, people with anxiety often have higher blood pressure.
These were not abstract numbers for me. During my most anxious stretches during high school, college, and my early medical career, I felt my blood pressure rise, heart rate increase, and noticed how often my shoulders and jaw were clenched, bracing for impact. Until I began practicing mindfulness and other techniques, this was all happening beneath my conscious awareness.
The heart-mind makes biological sense.
When anxiety keeps your body in constant "fight or flight" mode, your heart works overtime. It’s preparing the body for attack or escape. Stress hormones flood your system. Blood vessels constrict.
But over time, this chronic state wears down the very organ anxiety evolved to protect.
Chronic worry drives up inflammatory markers by 30–50%, similar to the strain caused by smoking. Even between panic episodes, people with anxiety often have higher blood pressure.
Panic or Heart Problem?
For my patients, few things are more frightening than chest pain.
Panic attacks often mimic heart problems, making it hard to know what's happening. Panic tends to strike suddenly and peak within minutes, bringing sharp chest discomfort that stays constant no matter what you're doing. Breathing exercises can sometimes ease the intensity. Heart attacks, on the other hand, often build more gradually, with pressure-like pain that radiates to the arm or jaw, lasts longer, and worsens with exertion.
When in doubt, it's always wise to seek medical care. As someone who has stood on both sides – patient and physician – I know how difficult that distinction can be.
Living Stuck in High Gear
The physiology of anxiety comes down to restoring balance.
Our sympathetic nervous system acts as the gas pedal, increasing heart rate and blood pressure to prepare us for danger. Our parasympathetic system acts as the brake, restoring calm and promoting recovery.
In anxiety disorders, the accelerator gets stuck to the floor while the brake stops working. The result is living in high gear at high speed: sleepless nights, tense muscles, shallow breath, and fatigue.
Worrying About Tomorrow
Anxiety rarely focuses on the present. It projects into the future, rehearsing scenarios that may never arrive.
Mark Twain captured this perfectly: "I've had a lot of worries in my life, most of which never happened."
A school principal once told me, "I'm always waiting for the other shoe to drop. Even when things are going well, I'm worried about what might go wrong." I knew exactly what she meant. Even on calm days, my mind had often prepared for disasters that never happened.
The Turning Point
My own shift came one night when I woke at 3 a.m. with chest tightness and a racing heart. In the past, I would have spiraled into catastrophic thoughts. Instead, I practiced the 4-7-8 breath I'd been learning: inhale for four counts, hold for seven, exhale for eight.
The sensations didn't vanish, but they softened. I observed the anxious thoughts without identifying with them – a practice psychologists call "cognitive defusion."
Within twenty minutes, calm returned. That night gave me a powerful new belief: my anxiety didn't have to control me.
Over the months that followed, I found a rhythm of steady practices that changed my relationship with anxiety.
Morning or afternoon meditation created a buffer around work. Walks outdoors steadied my nervous system. Open conversations with close friends reminded me I wasn't alone. I studied and practiced the basics of cognitive behavioral therapy, exploring and often reframing thoughts that were both fear-inducing and innacurate.
In parallel, my patients discovered their own anchors. One financial advisor found peace in swimming laps, a teacher found focus in her artwork, and a new mother relied on yoga to steady her breath.
The methods differed, but the principle was the same: creating conditions where the body remembers how to return to calm.
What the Research Shows
These personal discoveries align with decades of evidence. Cognitive Behavioral Therapy (CBT) has been shown to cut anxiety symptoms nearly in half within three months while improving cardiovascular markers.
Mindfulness-Based Stress Reduction (MBSR) lowers anxiety and improves heart rate variability. Regular aerobic exercise often works as effectively as medication for mild to moderate anxiety, with the added benefit of strengthening the heart itself.
The good news? 60-80% of people with anxiety disorders significantly improve with proper treatment. Whether through therapy, medication, lifestyle changes, or a combination, most people find relief.
Anxiety as a Messenger
The most important lesson I've learned is that anxiety is trying to tell us something.
Anxiety is not an enemy. Like a smoke alarm with heightened sensitivity, it signals because something important is at stake. When we listen, we often uncover values that matter most.
Practical Ways Back to Calm
There is no single cure, but there are reliable ways forward.
Simple breath practices like box breathing or the 4-7-8 technique can activate the body's calming response in moments of intensity. Grounding through the senses – noticing what you see, hear, touch, and smell – can bring the mind back into the present.
Over time, cultivating awareness of early signals such as shallow breathing or tense shoulders makes it possible to intervene before anxiety peaks.
More broadly, consistent routines – mindfulness practice, regular movement, restorative sleep, time in nature, and meaningful connection – strengthen the parasympathetic system, making the heart more resilient to stress.
From Racing Heart to Rest
Anxiety overwhelms because it makes everything feel urgent and dangerous. But once we recognize it as an overactive protection system rather than a personal flaw, we can meet it with compassion and skill.
The journey from anxiety to inner peace doesn’t involve making fear disappear. It’s about learning practices that restore physical and mental steadiness and clarity.
What is your anxiety trying to protect in you – and what helps you return to steadiness?
Next week, we'll explore the impact of depression on the heart – and the path back to vitality.
Dr. Jonathan Fisher is a Harvard-trained cardiologist and author of Just One Heart: A Cardiologist’s Guide to Healing, Health, and Happiness. He helps individuals and organizations integrate the physical, emotional, social, and spiritual dimensions of cardiovascular health.
Usually very calm in life’s storms, this year’s travel brought unexpected anxiety of the repeated hurdles of last year’s navigation of Crowdstrike and Hurricane Debby events. Both were smoothly accomplished, but the remembered anxiety resurfaced. So interesting viscerally. And yet all went well this trip to overlay that with no concerns.
Jonathan - I’m grateful for the way you bring both your clinical expertise and personal experience into this. It’s striking how you describe the cardiologist’s own heart racing while rushing to save another, such an important reminder that knowledge doesn’t insulate us from anxiety’s grip and our own fears.
I particularly appreciate you framing anxiety as a messenger that we can learn from rather than an enemy. That distinction related battling it and instead listening for what it protects us from I find rather helpful. I’ve also found that practices like breathwork, movement, and connection help create the space where steadiness can return to us, not because our anxiety go away completely, but because it no longer has to dictate the whole story.
Thank you!