February in Philly: A Doctor's Guide to the Month

February is the short, gray, cold heart of a Philadelphia winter, and it is also, by long tradition, heart month. That overlap is a gift if you use it. The weather keeps most of us indoors and a little slower, which is the right season to look at the numbers that decide your cardiovascular future long before a symptom ever shows up. This guide walks through the heart numbers worth knowing, how to measure your own blood pressure the right way, what the darkest stretch of winter does to mood, and what is still circulating while the cold holds.

The heart numbers worth knowing before anything hurts

Heart month usually turns into a reminder to eat better and move more, which is fine advice and not the point. The point is that most heart disease builds silently for decades, and the standard cholesterol panel that most people get once a year is not built to see it early. That panel gives you a total cholesterol, an HDL, an LDL, and a triglyceride number. Those are useful, but they measure the amount of cholesterol your blood is carrying, not the number of particles doing the carrying, and it is the particle count that lodges in artery walls and starts the process that ends in a heart attack.

The number that measures those particles directly is ApoB, or apolipoprotein B. Every harmful, artery-clogging cholesterol particle carries a single ApoB protein on its surface, so an ApoB level is a straight count of how many of those particles are circulating. Two people can have an identical LDL number and very different ApoB counts, and the one with the higher count is carrying more risk even though the standard panel called them the same. Our full ApoB and preventive cardiology guide walks through how the test works and what the targets are, and the short version is that ApoB tells you your risk with a resolution a standard panel cannot reach.

The second number is Lp(a), pronounced "L-P-little-a." Lp(a) is a cholesterol particle you inherit, set largely by your genes, and it stays roughly the same across your whole adult life. That makes it a once-in-a-lifetime test for most people: you check it a single time, and it tells you whether you are carrying an inherited layer of cardiovascular risk that diet and exercise will not move much. About 1 in 5 people carry a high Lp(a) and have no idea, because it is almost never on a routine panel. Knowing it changes the math on everything else. If your Lp(a) is high, it means the other numbers you can control, ApoB and blood pressure among them, deserve more attention and earlier action, because you are starting from a higher floor.

What knowing these numbers actually changes is the timing. The patient in our case story, the heart attack we caught seven years early, was 39, had a normal-looking cholesterol panel, and had a coronary calcium score of zero, which most people would read as an all-clear. His ApoB, his Lp(a), and his particle count told a different story, one that gave us 7 or 8 years of runway to change the outcome instead of finding out the hard way. That is the whole argument for checking early: a number you learn at 40 is something you can act on, and a symptom you feel at 55 is something you are reacting to.

How to take blood pressure at home, properly

Blood pressure is the other heart number that matters this month, and it is the one you can measure yourself for the cost of a good cuff. The catch is that most home readings are taken in a way that makes them close to useless, and a lot of people either scare themselves with a bad number or reassure themselves with a false one. Done right, a week of home readings is more informative than any single measurement a doctor's office will ever get, because it captures your pressure in the setting where you actually live.

Start with the cuff itself. Choose an upper-arm cuff, not a wrist model. Wrist cuffs are convenient and consistently less accurate, because the wrist arteries are smaller and the device's position relative to your heart throws the reading off. Within upper-arm cuffs, look for one that has been independently validated for accuracy. Several medical organizations publish lists of validated home devices, and a cuff that appears on one of those lists has been checked against a reference standard rather than just claiming it works. Size matters too: a cuff that is too small reads high, so measure around your upper arm and match it to the cuff's stated range before you trust a single number off it.

Then the technique, which is where most of the error lives:

• Sit still for 5 minutes first. No talking, no phone, no walking in from the cold and measuring right away. Rushing raises the number, and a February reading taken 30 seconds after you climbed the rowhome stairs will not tell you anything true.
• Sit with your back supported and both feet flat on the floor. Crossing your legs or sitting on the edge of a chair changes the reading. Rest your arm on a table so the cuff sits at the level of your heart, not hanging at your side or reaching up.
• Put the cuff on bare skin. Measuring over a sweater or a rolled-up sleeve that is squeezing your arm both distort the result.
• Take 2 readings a minute apart, and write both down. They will differ a little, which is normal. If the second is much lower than the first, keep going until they settle, and record the settled ones.

The protocol that actually tells you something is a week of this. Measure in the morning before coffee or medication and again in the evening, for 5 to 7 days, and bring the whole set to whoever manages your care. One rushed office reading, taken after you sat in a cold waiting room and got your arm squeezed by a nurse you just met, is the single least reliable snapshot of your blood pressure you can get, and it is the one most treatment decisions still get made on. Your own numbers, gathered calmly across a week, are what a good plan should be built from.

As for what deserves a call: a home average that sits above roughly 135 over 85 across that week is worth a conversation, even if you feel completely fine, because blood pressure does its damage without symptoms. A single reading at or above 180 over 120, paired with chest pain, trouble breathing, weakness on one side, trouble speaking, or a severe headache, is not a "call the office" situation. That is a 911 call. Short of that, a high week of numbers is information to act on calmly, not an emergency, and it is the kind of thing worth catching in February rather than discovering later.

When February weighs on your mood

February is the stretch of winter that wears people down the most. The novelty of the cold is long gone, the holidays are over, the days are still short, and in Philadelphia the sky can hold the same flat gray for a week at a time. If you have noticed that your energy is lower, that getting out of bed feels heavier, that you are sleeping more but resting less, that the things you usually enjoy feel muted, you are describing something common and treatable, not a personal failing.

The seasonal pattern of low mood is a recognized thing, and it tracks the light. As the days shorten, some people's internal clock and mood chemistry drift, and the result is a low that lifts as the light returns in spring. That it is predictable does not make it less heavy while you are in it, and it does not mean you have to wait it out alone. A few things really do help, and they are worth starting before the worst of it rather than after.

Morning light is the closest thing to a lever you have. Getting bright light into your eyes early in the day helps reset the internal clock that the short days have pulled out of rhythm. On a rare sunny February morning, a walk along the Schuylkill Banks or through your neighborhood within an hour of waking does more than it looks like it should. On the many gray mornings, a bright light box designed for this purpose, used for 20 to 30 minutes while you have your coffee, is the studied stand-in, and it is one of the better-supported tools for the seasonal pattern specifically. Movement is the other lever, and it does not have to be much: a regular walk, a class at a gym you can get to on the El, anything that gets you moving on most days blunts the low more reliably than waiting to feel motivated first. And because so much of this runs through sleep, our sleep optimization guide is worth reading alongside this, since the same short days that flatten your mood also scramble the timing that good sleep depends on.

Here is what I want you to hold onto: this is a health issue, not a mood you should be able to muscle through. If the low has lasted more than 2 weeks, if it is getting in the way of work or the people you love, or if you are having thoughts that scare you, that is the moment to message a doctor, not to wait for spring. Seasonal depression responds to treatment, sometimes to light and movement alone, sometimes to more, and the conversation is a kind and ordinary one to have. You do not need to be in crisis to deserve it.

What's still going around in February

February in Philadelphia is still solidly respiratory season. Flu is usually still circulating, and it often runs a second wave in February and into March after a December peak, so a fever, body aches, and a hard cough this month are as likely to be flu as anything else. If you did not get a flu shot in the fall it is still worth getting, because the season is not over. You can see how much is actually going around right now on our live flu tracker, which is more useful than guessing, and the broader respiratory illness tracker covers flu, COVID, and RSV together so you can read the week you are actually in.

February is also the heart of norovirus season, the short, violent stomach bug that tears through households, daycares, and anywhere people share close quarters through the winter. It spreads easily and survives on surfaces, and the usual hand sanitizer does less against it than people assume, so soap and water and cleaning shared surfaces matter more here. The illness itself is miserable but usually short, 1 to 3 days, and the main risk is dehydration, most of all in older adults and anyone who cannot keep fluids down. Small, frequent sips of an oral rehydration fluid beat forcing down big glasses of water, and a stomach bug that will not let you keep any fluid down for a full day, or that comes with signs of dehydration like dizziness and very little urine, is worth a message rather than waiting it out.

The household basics for February are unglamorous and they work: wash your hands with soap and water, stay home when you are sick instead of pushing through, keep some fever reducer and an oral rehydration option in the cabinet before you need them, and give the shared surfaces a wipe when someone in the house goes down with something. None of this is dramatic, and it is most of what keeps one person's February bug from becoming the whole household's week.

Guidance from the clinic

"The reason I love heart month is that it is the one time of year people are willing to look at numbers before anything is wrong. Most of the heart disease I want to catch is completely silent at the stage where I can still change it, which means the only way to find it is to go looking. An ApoB and a one-time Lp(a) in your 30s or 40s, a week of your own blood pressure readings taken calmly at home, these are not dramatic tests. They just give us a head start, and a head start is the whole game with the heart."

Scientific References

1. Sniderman, A. D., Thanassoulis, G., Glavinovic, T., et al. (2019). Apolipoprotein B particles and cardiovascular disease: a narrative review. JAMA Cardiology, 4(12), 1287-1295.
2. Tsimikas, S. (2017). A test in context: lipoprotein(a): diagnosis, prognosis, controversies, and emerging therapies. Journal of the American College of Cardiology, 69(6), 692-711.
3. Shimbo, D., Artinian, N. T., Basile, J. N., et al. (2020). Self-measured blood pressure monitoring at home: a joint policy statement from the American Heart Association and American Medical Association. Circulation, 142(4), e42-e63.
4. Golden, R. N., Gaynes, B. N., Ekstrom, R. D., et al. (2005). The efficacy of light therapy in the treatment of mood disorders: a review and meta-analysis of the evidence. American Journal of Psychiatry, 162(4), 656-662.

Related at Fishtown Medicine

• ApoB and preventive cardiology - the cholesterol test standard panels leave off, and what the targets are
• The heart attack we caught seven years early - a case story on why the early numbers matter
• Sleep optimization - why the short days scramble sleep, and how to protect it
• Philadelphia flu tracker - what is circulating this week
• Respiratory illness tracker - flu, COVID, and RSV together, updated live