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Archive for the ‘cardiology -Therapeutics’ Category

Your clock starts  now !

 

clock gif  dr s venkatesan002

Chronic stable angina : Most can be effectively managed  by  optimal /intensive medicines and life style Interventions .About 10% will require PCI/CABG.

ACS – STEMI:  Primarily  managed  with  rapid and competent  pre-hospital care with prompt thrombolysis in or out of hospital .Patients  with  large STEMI who develop complications (Again about 10 %)   require PCI and few additional  lives can be saved.

ACS-NSTEMI : This is  the group that demand  an  important role for PCI . All true high risk UA/NSTEMI patients  should receive urgent coronary  angiogram and critical lesions  should either be stented or  sent for CABG  (If the lesions are multiple and complex ) The field of interventional  cardiology  is  expected  to play a major  role in  this category of  patients for the simple reason , we  not only give dramatic  relief from angina and also prevent a  potentially a huge MI that is waiting to happen !

* It is vital to emphasise  the “Aim and  objective” in  NSTEMI  management  is critically different from other two. We know ,  in CSA   the aim is to give relief  symptoms  and improve excercise capacity . Both PCI/CABG  are  unlikely  to prevent a future MI in CSA..In STEMI it has already occurred .The aim is to salvage myocardium  and prevent  future events. While PCI can do the former , it can’t do the later . In STEMI scenerio ,we have very good  alternate  modality called thrombolysis which can easily beat the  pPCI  in , cost , availability and time  (and  hence efficiency as well  in  most  countries !)

Counter thought

The above suggestion  is too simplified ,generalized , misleading , and  unscientific, should   strongly be disagreed. For those people who disagree , I provide an alternate scheme  .It is ultra short ,comes in  5 lines .Very practical  and  scientific too  !

In any  patient , who is  suspected to have either  acute or chronic  coronary syndromes ,take them to the cath lab in an  urgent or semi urgent fashion .Do an angiogram and stent all lesions  that you feel important . If  stenting is not possible  manage  with optimal medicines and /or send them to the surgeons.

Final message

The essence of catheter based coronary care is simple.We complicate it. To understand this concept  100’s of cardiology  journals  and as many conferences and infinite  number of books are churned out every year !

 

 

 

 

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Current guidelines advice us to wait for 40 days following STEMI to implant ICD in most high risk patients.

Why this  cool off period.? *

  • Essentially  we are waiting for the Infarct healing process to be completed.
  • By this time electrical stability may be restored. The  risk of VT/VF  declines per naturalis.
  • LV function recovery  is possible. As stunned and hibernating myocardium resumes its mechanical function and patient might  jump out of the MADIT-2  cutoff point. (EF< 30%)
  • Introducing  ICD very early  after STEMI may be a myocardial irritant and that it self can generate  arrhythmias.
  • There is a possible interference by the leads in the physiological remodeling  process.

Final message

So the cool off period is  not only to reduce  the unnecessary  ICD implantation  but also to  avoid lead related issues .

*  This 40 day rule is based on one  large study from Germany. (DINAMIT, 2004  ) . However  few believe  the rule is not absolute. There can be individual   exceptions in high risk patients with critical LV dysfunction .

Other  wise   . . . How do you digest  a death occurring on  35th day  in a patient  who is waiting for an ICD scheduled one week later ?

Reference

DINAMIT trial ICD nejm

Link to  ACC/AHA  Guidelines for ICD Implantation 2013

New development

How to bridge the 40 day gap in really high risk post MI patient ?

We can’t keep him in CCU. Here comes the role of WCD (Wearable cardiovertor defibrillator.) Life vest is  from Zoll . WCD can act like a bridge till the 40 days when the patient becomes eligible for ICD.

http://lifevest.zoll.com/

 

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Coronary artery disease (CAD)  is man-kind’s  greatest threat in modern times.CAD ,diabetes ,Hypertension, obesity, mental illness  has become an epidemic  even among the young !

 

Lifestyle diseases cad risk smoking alcohol

There is a simple solution for  lifestyle diseases !

Just  . . .  Remove style from your life !

lifestyle diseases coroanry cardiology medical ethics inappropriate stents over treatment excess medical care , bio ethics,

Instead . . . try to live like these  Tibetian villagers

life purpose of living

Final message

One study which researched all lives who crossed 100 Years  concluded something like this !

“To live a longer and healthy life* ,Get up early  , have a purposeful daily chore that must include a physical component , work with conscience ,love every one sync with the nature and  lastly and most importantly remove style from your life !

Choose  your life . . . It is simply there in your hand for grabs !

Post-amble.

* Please note , Doctors  are never listed in the top with relevance to health of mankind  ! They simply cure some illness !

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A STEMI patient arrives late after 48 hours with chest pain .There is  persistent ST elevation.

What is the likely mechanism of this chest pain ?

  • Index infarct pain continuing . . .
  • Post infarct Angina-IRA territory
  • Re-infarction following intermittent re-perfusion  and re-occlusion
  • Remote  ischemia from a branch of IRA
  • Ischemia from a possible  non IRA lesion in a multivessel CAD

If this patient  comes to a non PCI eligible centre. Will you lyse him  ?

If post infarct angina is  unstable angina  . Isn’t  thrombolysis  contraindicated in UA  ?

How to differentiate Post Infarct Angina from Re-Infarction ?

A very tricky issue indeed.

Unless fresh ST elevation with fresh enzyme peak is documented these entities  cannot be differentiated.

(Even  fresh ST elevation can be related to infarct expansion ,stretch or early acute remodeling.Fresh enzyme  release or new peak  may not represent new infarct always .It can be due to intermittent re-perfusion of IRA .It may  simply represent a  enzyme  flush from the index infarct zone)

What is the practical , realistic , (Unscientific !)  solution  ?

Why break our head ? Never bother to differentiate PIA   from Reinfarction  etc . Let  it  be any thing . Do a emergency CAG .Stent  whichever  lesion looks good  for the same . Of course , make sure he has enough insurance coverage .

 

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This  query often  evokes  confusion  among fellows and General physicians .

              The answer is simple .Yes ,  you can.(With few conditions)

  • Thrombolysis  or PCI  is  done  with reference to  the  presence  or absence of ST elevation and chest pain.
  • If there is ongoing chest pain  and  significant new onset ST elevation  thrombolysis or PCI is indicated whether there is associated q  waves or not.

Clinical situations 

 Ischemic  q waves: Q wave can occur  with transmural ischemia which result in electrical stunning and loss of R waves . (Many of them  regenerate this R within few days after STEMI ,  indicating the q  waves can be  ischemic  in origin)

Reinfarction : Patients with  old  MI can develop fresh ST elevation  in q leads due to tachycardia and dyskinetic infarct segment .This group  of patients  should be carefully evaluated before labeling them as  re-infarction

* q RBBB in early hours of  anterior STEMI is fairly common which  may revert later. qRBBB is not a contraindication for re-perfusion .

Final  message

Presence of q waves does not  imply one should not  entertain  thrombolysis or PCI .The decision  to reperfuse  , rather  goes with  presence of  chest pain , ST elevation and  of course  within the  acceptable   time window!

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IVC filter usage has increased many fold in recent years.Please note , it is not indicated in every case of recurrent DVT/or PE. There are specific indications.

Permanent IVC filters

  1. Patients at risk for DVT /PE  with  absolute contraindication to anti-coagulants.
  2. Recurrent DVT/PE in spite of adequate  anti-coagulation

Temporary /Retrievable filters*

  1. It is used during high risk periods  for DVT following major trauma or Bariatric/Spinal /Neuro surgery (PREPIC 2 study ) .*Some of the retrievable filters can be kept for months ,years or even permanently. (If the risk period extends or it has trapped a huge clot.)

 

indication for IV filter prepic study

Outcome  of IVC filter (PREPIC  -8  year follow up study )

  • Reduces risk of PE
  • Increases risk of DVT
  • No impact on long term  survival
  • Clogging of IVC remain  an important Issue

Reference

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Shall I begin with a provocative quote (My own !)

Inability to think beyond  self , family, private life  reflects a backward and immature  state of human mind

How to eradicate this backwardness  we all suffer from !

I stumbled upon a book which made me wonder , whether  eradication of  backwardness is little to  do with education ! It lies much, much deeper in our cortical thinking influenced by  inheritance , evolution , culture and economy .

The stunning truth was exemplified  by  American political  scientist  Edward C. Banfield  .A must read for every one who have mind for society , community and the humanity !

In this book he introduced a new term to describe this self centered thinking as “Amoral familism”

“Banfield concluded that  human  plight was rooted in the distrust, envy and suspicion displayed by  them in  relations with each other. Fellow citizens would refuse to help one another, except where one’s own personal material gain was at stake. Many attempted to hinder their neighbors from attaining success, believing that others’ good fortune would inevitably harm their own interests”

Banfield theroy  and  “Moral Bankruptcy in Modern medical care

I am afraid  there is a  compelling link between Banfield’s observation in a remote Italian village  to the current  medical  community   mind set who care only for their patients who pay them and keep them happy !

If you  think  education will eradicate social backwardness ,Why ?  one of the most highly educated community that form the noble profession remain backward in their thinking !

How do you explain  innumerable instances of hospitals ,  doctors shutting doors for  lesser humans  even in dire emergencies ! ?

Why do many of them  join hands with powers that can be detrimental to the overall health of the society ?

The stunning irony is , they do it  unashamed (with pleasure  at times!)  in  violation of the oath they take when they join the Noble profession. Shall we call it  as ” Moral Bankruptcy in medical care ?

Read further

Moral Basis of a Backward Society 
 
Moral basis of a backward society banfield

Highlights of this book  (Text from Wikipedia)

The Moral Basis of a Backward Society is a book by Edward C. Banfield, a political scientist who visited Montegrano, Italy . He observed a self-interested, family centric society which sacrificed the public good for the sake of nepotism and the immediate family. Banfield as an American was witnessing what was to become infamous as the “mafia” or families that cared only for its own “members” at the expense of their fellow citizens. Banfield postulated that the backwardness of such a society could be explained ‘largely but not entirely’ by ‘the inability of the villagers to act together for their common good or, indeed, for any end transcending the immediate, material interest of the nuclear family’.

 

Link to this book in PDF

 

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