روش انجام تست ورزش

برای انجام این تست اول نبض و فشارخون اندازه گیری و ثبت میشوند به فرد الکترودهای مربوط به نوار قلبی را متصل میکنند و نوار قلب اولیه گرفته می شود سپس بیمار جهت ورزش (دویدن) بر روی دستگاه تردمیل قرار میگیرد. این دستگاه بصورت یک صفحه لاستیکی متحرک و غلطانی است (شبیه چرخ نقاله) که بیمار بر روی آن ایستاده و باید بر اساس سرعت آن بر روی آن راه برود یا بدود. هر۳ دقیقه شیب نوار و سرعت حرکت آن بر اساس برنامه از پیش تعریف شده، افزایش خواهد یافت. ابتدا دستگاه آرام حرکت میکند اما بتدریج سرعت میگیرد و فرد باید روی تسمه نقاله متناسب با سرعت تسمه نقاله مخصوص بدود. بتدریج دستگاه شیب پیدا میکند و حالتی ایجاد میشود که فرد در حال دویدن از سربالایی پیدا میکند. علائم حیاتی و نوار قلب بیمار در حالتهای مختلف کنترل میشود تا تغییرات قطعات و امواج آن در حالت ورزش مشخص شود.
بر اساس سن و جنس، حد معینی از ورزش و حداکثر ضربان قلب که بیمار باید به آن دست یابد ، پیش از شروع ورزش مشخص شده و دویدن تا آن زمان ادامه خواهد یافت. در صورتی که طی آزمون ضربان قلب به حداقل ۸۵% از حداکثر ضربان قلب مورد انتظار سن و جنس برسد نتایج آزمون قابل تفسیر خواهد بود. . بهترین و قابل اعتمادترین نتیجه مربوط به زمانی است که به حداکثر(۱۰۰%) فعالیت پیشبینی شده بدون بروز درد سینه، تنگی نفس مفرط یا تغییرات نوار قلب نایل شود و این، حدودا به ۱۲- ۱۰ دقیقه ورزش نیاز دارد.با این حال در هر زمان که بیمار واقعا احساس کرد قادر به ادامه ورزش نیست یا چنانچه دچار بعضی علائم بالینی نظیر درد سینه ، تنگی نفس مفرط ، سرگیجه و سردرد شدید شود، یا تغییرات غیر عادی در نوار قلب بروز کند یا فشار خون افت کند، آزمایش پیش از موعد باید قطع شود.
برخی افراد مسن یا کسانی که دردهای مفصلی و عضلانی دارندو ناتوان از انجام تست ورز شی هستند نیز افرادی که بدلیل تغییرات نوار قلب پایه امکان تفسیر تغییرات نوار قلب جدید وجود ندارد باید از روشهای دیگر مثل اسکن رادیوایزوتوپ قلب با استرس دارویی (تست تالیوم) یا استرس اکوکاردیو گرافی بجای ورزش روی آنها انجام گیرد. اسکن قلب و استرس اکوکاردیو گرافی نسبت به تست ورزش آسانتر و دقیقتر میباشد اما هزینه بیشتری دارد.
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