Last week, Theresa, 51, said something I have heard from too many women in my practice: "I really thought I was dying. Twice."
She is a paralegal at a small firm, mother of two kids in college, a woman who runs three mornings a week. None of that prepared her for what started happening at 3 a.m.
She woke one night with her heart pounding so hard she could feel it in her throat. Her husband drove her to the ER, where the EKG and bloodwork came back clean.
The resident used the word anxiety, handed her a referral she did not use, and sent her home. Three months later it happened again, same hour, same pounding, same clean workup.
By the time Theresa got to me, she had started leaving the hallway light on the way she did when her kids were small. Ever had that feeling, where the thing you are scared of is your own body and there is nowhere to go?
When the White Noise Cuts Out
Estrogen and progesterone are not only reproductive hormones. They are two of the quiet stabilizers of the cardiovascular system.
Think of them as white noise running in the background, smoothing out every small surge in your heart's rhythm so you did not have to notice it. For decades, that white noise has done its job.
Why You Are Not Imagining This
In perimenopause, it starts cutting in and out. Research suggests that as estrogen fluctuates and progesterone declines, the autonomic nervous system, which governs your heartbeat and your stress response, becomes more reactive, so small triggers can produce bigger surges.
Picture a smoke detector that has grown too sensitive. Nothing is on fire, but a little steam from the kettle now sets it off, and it goes off loudest at 3 a.m. when nothing else is competing for your attention.
I am sharing Theresa's story because I have heard versions of it from women in their late 40s and 50s more times than I can count. Different details, same fear, same clean ER workup, same word anxiety on the discharge papers.
Recognize yourself in any of that? It is not weakness, it is not your imagination, and it is not in your head.
What Actually Helped Theresa
🍷 Cut Back on Alcohol and Caffeine in the Second Half of the Day
Why it matters: both can amplify the nervous system when it is already running hot, and the effect tends to show up at night.
Notice how afternoon coffee lands compared to morning
Pay attention to evening wine and overnight palpitations
Pull back where the pattern is clearest
🌬️ Try Slow Nasal Breathing at the First Flutter
Why it matters: the longer exhale activates the calming side of the nervous system and often shortens an episode.
Four counts in, six counts out
Repeat for two or three minutes
Use it the moment you notice a flutter, not after
📋 Keep a Simple Log
Why it matters: patterns give you and your doctor something real to work with.
Note when episodes happen, what you ate, and how you slept
Track where you are in your cycle if you still have one
You are collecting context, not building a case
If your palpitations are new, frequent, or accompanied by chest pain, shortness of breath, dizziness, or fainting, please see your doctor and ask for a full cardiac workup.
Hormonal palpitations are real, and so are other cardiac and thyroid conditions worth ruling out. You deserve all of them taken seriously, not one dismissed as anxiety on your way out the door.
Theresa still has palpitations sometimes. They wake her less often now, and when they do, she recognizes them as the smoke detector being touchy, not the house on fire.
You are not having a heart attack. You are living with a more sensitive alarm system, and now you know how to read it.