CompensationHeart attackSupreme Court of India

Mackinnon Mackenzie & Co. (P) Ltd. v Ibrahim Mahmmed Issak

AIR 1970 Supreme Court 190619701 min read
The case in brief30-second read
Facts
Worker employed by Mackinnon Mackenzie (shipping company) Suffered a heart attack during working hours at the workplace. Had a pre-existing heart condition.
Issue
Whether a heart attack suffered during employment "arises out of" employment when the worker has a pre-existing heart condition but work strain contributed to the attack.
Held
If work strain is a contributing cause to the heart attack, the injury arises out of employment.
Principle
If the strain of work is a contributing cause to a heart attack, the injury arises out of employment. Employment need not be the sole cause; contribution is sufficient.
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Facts

  • Worker employed by Mackinnon Mackenzie (shipping company)
  • Suffered a heart attack during working hours at the workplace
  • Had a pre-existing heart condition
  • Employer argued:
  • Heart attack was due to personal illness (coronary artery disease)
  • Not caused by employment

Issue

  1. Whether a heart attack suffered during employment "arises out of" employment when the worker has a pre-existing heart condition but work strain contributed to the attack.

Held

  • If work strain is a contributing cause to the heart attack, the injury arises out of employment
  • Employment need not be the sole cause; contribution is sufficient
  • Pre-existing condition does not defeat the claim
  • The test: did the exertion, strain, or conditions of employment contribute to or accelerate the cardiac event?
  • Compensation payable

Ratio decidendi

Where the strain of work is a contributing cause to a heart attack, the injury arises out of employment. The employer cannot defeat the claim by showing the worker had a pre-existing condition. Employment need not be the sole or dominant cause; any material contribution suffices.

Exam use

How to use it in an answer

  • The leading Part C authority on heart attack at work
  • Exam pattern: "Worker suffers heart attack during employment. Employer says personal illness. Advise."
  • Structure: State ratio (contributing cause test), cite Mackinnon Mackenzie, apply (was there work strain?), conclude (compensation payable if work contributed)
  • Key line: "In Mackinnon Mackenzie v. Ibrahim (1970), the Supreme Court held that if work strain is a contributing cause to a heart attack, the injury arises out of employment, and the employer cannot plead the worker's pre-existing condition as a defence."

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Citation

Mackinnon Mackenzie & Co. (P) Ltd. v. Ibrahim Mahmmed Issak AIR 1970 Supreme Court 1906

Reported: AIR 1970 SC 1906. This is an educational summary, not the judgment itself. Cite the reported version in professional or academic work.