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Name Dr. Shirish Hastak

Designation Director, Stroke Services and Consultant, Neurology

Qualifications MBBS, MD (Gen Medicine), DM (Neurology)

Fellowships University Hospital and The University of Western Ontario, London, Ontario, Canada

Speciality Interests Stroke Neurology and Thrombolysis in Acute Stroke

Experience Dr. Shirish Hastak has set up the Stroke Programme at Kokilaben Hospital. He is responsible for the medical management of patients with stroke.

Dr. Shirish Hastak is the President of the Indian Stroke Association. Before joining Kokilaben Hospital, he was attached to Lilavati Hospital, Mumbai. He has set up the first Stroke Helpline in India and the first Indian Stroke website.

ACADEMICS/RESEARCH/AWARDS Dr. Shirish Hastak has a number of publications in National and International peer reviewed journals. He has delivered lectures in National and International conferences.

Dr. Shirish Hastak - Brain Attack Or Stroke: The New Hope | Neurology

Brain attack or stroke is a block or rupture of a blood vessel in the brain. In India about 14 lakh people every year suffer from this dreadful disorder but few are aware about the availability of modern care. This is a story of a doctor helped by modern medicine and may allow you to help your dear one.

Stroke - Stroke Treatment in Mumbai

This 50 year old doctor went to the Cardiologist and was found to have irregular heart beats. Previously she was known to have familial heart disease. Two days later she developed right hand and right leg weakness with a major blood vessel block in the left side of brain. She was brought to the Kokilaben Dhirubhai Ambani Hospital in Mumbai for the management of Acute Stroke under Dr. Shirish M.Hastak, Consultant Neurologist, who is Incharge of Stroke Services in the hospital. Her MRI Brain at admission showed a small area of brain damage with a big artery blocked in the brain.

Immediately Dr. Manish Shrivastava, Consultant in Interventional Neuroradiology was called. He felt that the patient would benefit by mechanical clot removal. 2 hours following the stroke, a special device named Penumbra Device was inserted through the groin to reach her blood vessels of brain. The device sucked out the clot from brain vessel and restored blood flow to the brain.

After the clot was removed patient was admitted in the Intensive Care Unit for 5 days. On discharge 10 days later she had recovered completely from the stroke. This mechanical clot retrieval from the brain is one of the 1st cases to be done in the city within the 4.5 hours window. Our Centre has the maximum experience in India in removal of clots from inside the brain by a mechanical clot removal technique. This is one of the few hospitals in the country with a complete Stroke Team and a Stroke Unit available round the clock.

If you have any of the following symptoms suggesting a stroke, please rush to a proper hospital.

REMEMBER ... F A S T:

F – FACE : Sudden change in facial expression
A – ARM: Sudden change in arm or leg function
S – SPEECH : Sudden change in speech
T – TIME : Rush to a proper hospital with stroke care facilities in time

TIME IS BRAIN ... AND TIME LOST IS BRAIN LOST…

Find out more about Stroke / Brain Attacks here or find out more about our Stroke Care team here

Dr. Shirish Hastak | Once is Not Enough

66 year old male with past history of hypertension on regular treatment presented with sudden onset of weakness of left arm and leg with facial deviation and slurring of speech. After ruling out other factors, patient was clinically diagnosed as right MCA infarct. Patient’s NIHSS was scored to be 7. CT brain with CT angiography revealed no bleed but demonstrated focal occlusion of the right main stem MCA. Large arteries extracranially were reported to be normal. Patient presented within the time window and had no contraindication to use of IV actilyse. Patient was administered IV actilyse 70 mg, and monitored. CTA post thrombolysis revealed partial recanalistion of the M1 branch of the right MCA. The mechanism of the stroke was large vessel disease of the intracranial vessels / Non carotid large vessel disease (M1 block). Patient recovered well and the NIHSS on discharge was 0 and MRS was 0. Patient was discharged on antiplatelets and statin ie on best medical therapy.

1 month later patient presented with an episode of left arm weakness and unresponsiveness lasting for 15 minutes. Patient’s symptoms resolved on his own and recovered completely. MRI brain was performed which confirmed a subacute infarct in the right MCA territory.

After another 2 months the patient presented with left hemiparesis and left facial deviation and slurring of speech. NIHSS on admission was 12. CTA brain demonstrated a occlusion of the right MCA once again with – infarcts in right insular cortex and right fronto-parietal white matter, right periventricular white matter. Once again patient presented within the window for treatment of IV actilyse. Patient had already been treated once earlier with IV actilyse, three months prior to this presentation. Patient was once again treated with IV actilyse and monitored. Post thrombolysis MRA brain demonstrated right MCA infarct with no hemorrhagic transformation and partial recanalisation of the M 1 segment of right MCA with sluggish flow. Patient improved remarkably and NIHSS reduced to 5, MRS was 2. Patient was advised to undergo intracranial stenting in view of stroke while on best medical treatment.

Patient was stented in the right MCA, one month later, patient recovered well with complete recovery in the hemiparesis and remarkable improvement in speech. The current NIHSS = 1 and MRS = 1.

Discussion:-
Occlusion of a brain vessel leads to a critical reduction in cerebral perfusion and, within minutes, to ischemic infarction with a central infarct core of irreversibly damaged brain tissue and a more or less large area of hypoperfused but still vital brain tissue (the ischemic penumbra), which can be salvaged by rapid restoration of blood flow. Therefore, the underlying rationale for the introduction and application of thrombolytic agents is the lysis of an obliterating thrombus and thus reestablishment of cerebral blood flow by cerebrovascular recanalization with subsequent reperfusion.
Available clot bursting agents include –
Pharmacolgical agents like recombinant tissue plasminogen activator (rtPA)ieAlteplase can be used Intravenous or Intra arterial.
Mechanical clot retrieval or suction thrombectomy devices.
Combination of pharmacologic agent and mechanical agent ie bridging.
Sono thrombolysis.
Thrombolysis with intravenousalteplase is the primary therapy for acute ischemic stroke. Early administration improves functional outcome, though benefit and risk depend on the time elapsed between stroke onset and initiation of treatment. Randomized controlled trials demonstrated benefit from intravenousthrombolysis when initiated up to 4.5 hours after symptom onset, and pooled analysis of all trials indicates that the sooner that alteplase is given, the greater is the benefit. Treatment carries a risk of bleeding, with symptomatic intracranial hemorrhage (SICH) of around 3%. Initiating treatment after 4.5 hours increases mortality and reverses the risk-benefit balance.
But, opening a clot is not considered as goal of or parameter of stroke recovery, ie recanalization is not reperfusion. This can be attributed to various reasons ie the ischemic penumbra may not exist in the patient, or penumbra may be involving the non eloquent cortex and hence there is no measure of functional recovery.
The success of the use of a clot bursting agent is dependent on various factors which include -
Clot site
Clot length
Collateral flow
Clot donor

CLOT SITE- Recanalization Rates WITH IV ALTEPLASE (ACTILYSE)

  1. M1- MCA- 32%    2) M2- MCA- 30%    3) ICA- 4%    4) Basilar Artery – 4%

Clot length - MCA clot length > 8 mm has low potential for recanalization with I/V thrombolysis and patients have poor outcome.

Collateral flow - With IV thrombolysis outcomes are better when collateral flow is good. Thrombolytic therapy may act from both sides of the clot when collateral flow is good. Good collateral status was associated with larger penumbra and also increased survival of penumbra

Clot donor – Delineating the mechanism of stroke is the fundamental step in stroke treatment and prevention.  Mechanism is largely divided according to TOAST criteria or ICD 10 classification. Donor site needs to be taken into consideration after IV thrombolysis to prevent recurrence of stroke.

We present a case where in, we have used intravenous recombinant tissue plasminogen activator (rtPA) twice within a period of 3 monthsin a patient with intracranial large vessel atherosclerotic disease.  In the first stroke – Patient presents to us with moderate stroke with NIHSS = 7. CTA Brain demonstrated a clot in the M1 segment of the right MCA with good collateral flow. The patient satisfied all criteria for IV thrombolysis which was administered. The patient demonstrated early neurological improvement ie Lazarus effect. Lazarus effect (early neurological improvement) in the NIHSS score at 2 hours was a good predictor of recanalization after IV thrombolysis and suggested good functional outcome at 3 months.

The repeat CTA Brain at 24 hrs demonstrated partial recanalisation of the right MCA with moderate flow.
According to guidelines, patient was managed with best medical treatment on anti platelets and statin with control of risk factors ( Hypertension in this patient’s case).

In about three months of original cerebro vascular event, patient represented with a new episode of left hemiparesis. Again the right MCA was found to be occluded at the M1 segment. Guidelines of IV alteplase limit its use (contra indication) within a period of three months of a cerebro vascular event. The patient satisfied this criterion and hence he was once again treated with IV Alteplase. Once again the patient demonstrated the Lazarus effect with remarkable neurologic recovery within first 2 hrs and subsequent 24 hrs. Post IV tPA MRA Brain suggests partial recanalisation with good collateral flow.

In view of intracranial large vessel disease, patient underwent right MCA stenting. The patient is now being followed up in the outpatient dept where he does not report any recurrence or TIA like symptoms.

We present a unique case where in the patient has been treated with IV alteplase twice in a period of three months and has shown remarkable neurologic recovery. No particular guidelines are currently available on the use of IV alteplase for a second time.  Is a second treatment with rtPA within three months hazardous? rtPA is cleared rapidly from blood and metabolized mainly by liver. The plasma half life alpha is 4 to 5 minutes and beta half life is about 40 minutes. A marked and prolonged decrease of the circulating fibrinogen level is unusual. Though repeat IV thrombolysis within a short interval may involve a considerable risk of serious hemorrhage, especially in the infracted area, three months is considered to be a safe period for the use of repeat IV thrombolysis according to prescription guidelines.

We will like to stress on delineating the mechanism of stroke and to think beyond the guidelines in particular situations while adhering to them to help patients appropriately.

REFERENCES:-

  1. Keyser JD, Gdovinova Z et al. Intravenous Alteplase for StrokeBeyond the Guidelines and in Particular Clinical Situations. Stroke. 2007; 38: 2612-2618
  2. Alexandrov AV, Grotta JC.Arterial reocclusion in stroke patients treated with intravenous tissue plasminogen activator. Neurology. 2002 Sep 24;59(6):862-7
  1. Topakian R, Gruber F, Fellner FA, Haring HP, Aichner FT. Thrombolysis beyond the guidelines: two treatments in one subject within 90 hours based on a modified magnetic resonance imaging brain clock concept. Stroke 2005 Nov;36(11):e162-4. Epub 2005 Oct 6.

 Authors:-
Dr.Shirish HastakMD, DM
Consultant Neurologist, Director of Stroke Services, KDAH
Past President of Indian Stroke Association

Dr. Manish Shrivastav, DNB
Head, Interventional Neuroradiology, KDAH

Dr. Vishal Shah, MBBS
Resident, KDAH


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