Red flags: the chest pain ladder and the three traps that kill

The ladder, top to bottom

1. RECOGNIZE Chest pressure, or the equivalent presentation: jaw, arm, back, or epigastric discomfort, unexplained dyspnea, nausea with diaphoresis. Women, older adults, and people with diabetes present atypically and are missed for that reason.
2. MONITOR AND ACCESS Continuous cardiac monitoring, full vital signs with oxygen saturation, and intravenous access. Oxygen only if the saturation is low.
3. TWELVE-LEAD WITHIN TEN MINUTES Obtained and read by a qualified clinician within ten minutes of arrival. Repeat it if the pain changes.
4. INTERPRET THE PATTERN Regional ST elevation with reciprocal change, or widespread ST elevation with PR depression, or ST depression and a normal tracing.
5. ACT Regional elevation activates the reperfusion pathway. Widespread elevation with PR depression points to pericarditis and its endpoint. Depression or a normal tracing means serial tracings, serial markers, and continuous watching.

Panel 1 · The nitrate trap

Inferior infarction with right ventricular involvement leaves the patient dependent on filling pressure to move any blood forward at all. A nitrate, an opioid, or a diuretic drops that pressure abruptly. The finding to catch is hypotension immediately after a dose that should have relieved pain. Stop the drug, lay the patient supine, notify, and anticipate volume support rather than more vasodilation.

Panel 2 · Pericarditis and its endpoint

Sharp pleuritic pain that worsens lying down and eases sitting forward, a friction rub, and ST elevation that is widespread with PR depression rather than confined to one territory. If the effusion grows into tamponade, look for hypotension, distended neck veins, and muffled heart sounds together, with a narrowing pulse pressure and a pulsus paradoxus greater than 10 mm Hg. Prepare for pericardiocentesis and protect filling while preparing.

Panel 3 · Pressure and puncture

Hypertensive emergency is severe elevation, usually systolic greater than 180 mm Hg or diastolic greater than 120 mm Hg, together with evidence of acute organ injury such as new visual change, headache with confusion, chest pain, or falling urine output. The danger is in the treatment: lowering the pressure too far too fast strokes the patient. Reduction is gradual, monitored continuously, and guided by the order. After catheterization, flank or back pain with a falling pressure and a rising heart rate suggests retroperitoneal bleeding even when the groin site looks dry.

Post-procedure watch. After catheterization: bed rest with the affected leg straight for the ordered period, site checked for bleeding and hematoma, distal pulses and color and temperature and sensation compared with the other limb, and fluids encouraged to clear the contrast. After coronary bypass: mediastinal chest tube output reported when it exceeds the volume written in the order, sudden cessation of drainage reported as a possible tamponade, new atrial fibrillation expected around the second and third day, sternal precautions taught, and no blood pressure taken in an arm used for radial artery harvest.

Memory hookQUIET HEART, FULL NECK, FALLING PRESSURE. Registered as B8-BECK-HOOK.

Watch outa normal-looking puncture site does not rule out bleeding.

Collapse belongs to → BOOK 09 · P9. Values belong to → BOOK 07 · P4.

Takeawaybefore the nitrate, know which wall is involved and what the pressure is doing.