Fatal, deadly, lethal, mortal apply to something that has caused or is capable of causing death. Fatal may refer to either the future or the past; in either case, it emphasizes inevitability and the inescapableâthe disastrous, whether death or dire misfortune: The accident was fatal. Such a mistake would be fatal. Deadly looks to the future, and suggests that which is likely to cause death (though not inevitably so): a deadly poison, disease. Like deadly, lethal looks to the future but, like many other words of Latin origin, suggests a more technical usage: a lethal dose; a gas that is lethal.
Making the world better, one answer at a time. Causes of extrasystole include alcohol, ischemia, hypoxia, and myocarditis. Extrasystole is defined as a premature beat in the heart that causes momentary arrhythmia. Causes of extrasystole include alcohol, ischemia, hypoxia, and myocarditis. Extrasystole is defined as a premature beat in the heart that causes momentary arrhythmia.
Hypochromia is characterized by an increase in central pallor. It is said to be present when greater than 1/2 of the cell diameter has central pallor. Hypochromia is caused by a deficiency in the production of hemoglobin, which is usually the result of iron deficiency caused by chronic hemorrhage. Poikilocytes are frequent in iron-lack anemia and are thought to result from oxidation of the erythrocyte membrane resulting in fragmentation.