Physiology Stents Tachycardia 
Dr. Smith's ECG Blog
JANUARY 9, 2024
The patient is female in her 80s with a medical hx of previous MI with PCI and stent placement. She had a single chamber ICD/Pacemaker implanted several years prior due to ventricular tachycardia. Answer : The ECG above shows a regular wide complex tachycardia. Cardiac output (CO) was being maintained by the tachycardia.
Dr. Smith's ECG Blog
FEBRUARY 6, 2023
Cath done around 4pm next afternoon: Acute culprit lesion: LCX 99%, TIMI 1 flow, stented Also LAD 50%, TIMI 3 flow, which was also stented And chronic RCA occlusion with collaterals (no information is in the cath report regarding where the collateral flow is from, for example if collateral flow was from the LAD or LCX).
EMS 12-Lead
MARCH 19, 2023
He denied any known medical history, specifically: coronary artery disease, hypertension, dyslipidemia, diabetes, heart failure, myocardial infarction, or any prior PCI/stent. Another factor to be considered, according to Chou’s textbook, is that many patients have dual AVN physiology and conduction is preferential down the fast pathway.
Dr. Smith's ECG Blog
NOVEMBER 26, 2018
2) Tachycardia to this degree can cause ST segment changes in several ways. First , there can simply be diffuse ST depressions (which obligates reciprocal STE in aVR) associated with tachycardia which are not indicative of ischemia. Serial troponin T measurements rose from zero to 2.80 ng/mL over the next 10 hours.
Dr. Smith's ECG Blog
OCTOBER 7, 2019
Although the shock is no doubt partly a result of poor pump function, with low stroke volume, especially of the RV, it should be compensated for by tachycardia. He was successfully stented. Cardiac output is stroke volume x rate, so this patient needs a higher heart rate. This is a perfect indication for atropine.
Dr. Smith's ECG Blog
JANUARY 28, 2025
The thrombus was aspirated and the distal RCA was stented. The physiologic reason for this finding is that the T wave axis in the limb leads generally follows the QRS axis. The patient waited another three hours in the ED until the cath lab was ready to accept him. There was TIMI 2 flow distal to the thrombotic occlusion.
Dr. Smith's ECG Blog
MARCH 8, 2025
After stent deployment, we often see improvement in the ST-T within seconds or minutes. Here is the final angiogram following placement of a stent in the ostial RCA. 2:04 PM, post stent deployment You can see that even after complete restoration of flow, the ECG still looks terrible, V most of all.
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