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Posts Tagged ‘dapt’

Here is a current review on a topic, which needs some Introspection

For a kid, A stands for apple in kindergarten, while in the school of cardiac pharmacology, A would sound as Aspirin. Such is the importance of this drug, known for its obedient, predictable efficiency in the entire spectrum of CAD right from primary prevention of CAD to emergent primary angioplasty in Cath lab. Most of us will also agree, It is a work horse drug, not only for the cardiologists , but has been an anchor drug in as many critical general medical therapeutics, wherever platelets are to be passivated.

We are well aware of molecular basis of this drugs action. Aspirin impacts most points in the core axis of platelet adhesion , activation and aggregation either directly or indirectly .(Though, its just a COX 1 blocker) Its efficiency is backed by countless papers with authenticated evidence.

Final message

“Now, we, realize Aspirin is being targeted and facing potential elimination

Why is this happening ?

Aspirin acts by just blocking thromboxane mediated platelet activation , it doesn’t antagonize adenosine triggered activation, hence it is useless is the argument. Some how, our thought faculty is intruded , and unable to realize, the same question can be played in reverse .

P2-Y12 blockers in whatever form & fashion ,helplessly watch thromboxane A2 promoting platelets activation , isn’t ? Please understand, many cases of Clopidogrel and Ticagrelor resistance is apparently related to lack of assistance from the Aspirin .(Genetic P450 heterogenicity story doesn’t explain this fully )

The other concern is Aspirin increases the bleeding risk. It is a perfect irony , this argument is exactly opposite the one discussed above, Implying Aspirin could be a more powerful anti-platelet agent.

It is a duty of every one of us, to find the true reasons for such a bias against Aspirin. However strong the evidence base, (that is being created) It is very difficult to believe , Aspirin is shown the exit door for academic reasons.

Post test

If you want to convert Dual-APT to Mono-APT , which will you jettison ?

A.Aspirin

B.Clopidogrel

C.Ticagrelor

D.Whatever the guideline say.

E.Will leave it to the patient to decide.

Reference

1.Piera Capranzano, David Moliterno, Davide Capodanno, Aspirin-free antiplatelet strategies after percutaneous coronary interventions, European Heart Journal, 2024;, ehad876, https://doi.org/10.1093/eurheartj/ehad876

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Forget NEJM, Circulation, JACC, for some time. Hope & wish every one of us is aware of a journal called Blood, bringing stunning and dramatic discoveries week after week ,about the most crucial fluid that sustains our life. The journal Blood is published by the American Society of Hematology since 1949. Its impact factor is currently 20.8, celebrating its 75th year of existence .

We know, heart disease consistently tops the global mortality and morbidity charts . Without blood, heart is just a purposeless organ with four empty chambers. More than ninety percent of the cardiac mortality happens due to freezing and interruption of blood flow to the vital organs. Can any one dispute, heart is an Innocent bystander, when ACS happens due to an unscheduled pitched battle between blood and the coronary arterial wall ?

It is no surprise ,cardiologists spend most of their practicing time, fighting blood from freezing and trying to restore the flow. It is hard to believe there is absolutely little interaction between Hematologists and cardiologists dealing with the same organ.

Meanwhile, the drugs we use , pose a constant threat of bleeding elsewhere.As a clinician and cardiologist, anxious queries from our fellows such as this one are not infrequent. Sir, that lady with a prosthetic valve in room 306, is bleeding in gums . Should I stop the OAC ? She is also getting clopidogrel for the recent PCI. What shall we do?

Want answers to such questions ? Need to spend time guys. In an excellent review article, the prestigious journal talks about tackling bleeding patients and how to counter various drugs that can cause bleeding.

Reversal strategies in a bleeding patient

This table is just a sample from the paper. Thankfully full text is free in its site.

Final message

It seems , there are about 30,000 medical journals listed in Pubmed . Cross-specialty reading for relevant, up-to-date knowledge is always welcome. This will help us come out of the undesirable tag of super specialist or individual organ specialist.

Looking forward to the days when hematologists and cardiologists sit together frequently to discuss the strategies in unexplained ACSs, DVTs, other procoagulant (as well as pro-bleeding conditions)

With more and more metallic foreign bodies ,making heart as their residence, this type of Interactions will become all the more important.

Reference

Piran S, Schulman S. Treatment of bleeding complications in patients on anticoagulant therapy. Blood. 2019 Jan 31;133(5):425-435. doi: 10.1182/blood-2018-06-820746.

Next thought

Trying to go deep into this journal, and find the truth behind Red and white clot , which I never understood right from the medical school days.

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DAPT -Dual anti-platelet therapy has become  a standard in many clinical situations of CAD.There has been significant confusion about ,Indications, best combination, duration of DAPT, withholding of DAPT, conversion to MAPT (mono) etc.The  JACC september 2016 issue  brings much needed clarity  on this issue.

Link to key summary from NEJM journal watch.

http://www.jwatch.org/na42407/2016/09/28/update-dual-antiplatelet-therapy-patients-with-coronary?

Full text guideline

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