Understanding Your Dobutamine Stress Echocardiogram (DSE)

Welcome to the Non-Invasive Cardiac Laboratory (NICL) at Hospital Sultan Idris Shah.

If you or your loved one has been scheduled for a Dobutamine Stress Echocardiogram (DSE), this guide will help you understand the purpose of the test, how to prepare, and what to expect during your appointment.

What is a Dobutamine Stress Echocardiogram?

A Dobutamine Stress Echocardiogram (DSE) is a specialized diagnostic test that combines an ultrasound of the heart (echocardiogram) with an intravenous (IV) medication called Dobutamine.

Normally, heart function under stress is evaluated by having a patient walk on a treadmill. However, for patients who cannot walk or exercise due to severe arthritis, joint pain, stroke, balance problems, or lung conditions, a treadmill test is not feasible.

Dobutamine acts as a substitute for physical exercise. It gently stimulates your heart, causing it to beat faster and pump harder—simulating the exact effects of brisk exercise while you rest comfortably on an examination bed. High-frequency sound waves (ultrasound) are used to capture real-time moving images of your heart muscle and valves as the workload increases.

Why has your doctor recommended this test?

Your cardiologist may order a DSE to:

  • Diagnose coronary artery disease: Identify narrowed or blocked arteries that restrict blood flow to heart tissues under increased demand.
  • Evaluate heart muscle viability: Determine if areas of damaged heart muscle (e.g., following a heart attack) can recover function with treatment.
  • Assess heart valve severity: Evaluate how heart valves (such as in aortic stenosis) function under hemodynamic stress.
  • Pre-operative cardiac clearance: Evaluate heart safety prior to major non-cardiac surgery in patients unable to perform standard physical exercise tests.

How to Prepare for Your Test

Proper preparation ensures the test is safe and yields accurate diagnostic results.

1. Fasting Guidelines 🍽️

  • Fast from solid food for at least 3 to 4 hours before your appointment.
  • You may take small sips of plain water if necessary. Fasting reduces the risk of mild nausea during the medication infusion.

2. Avoid Caffeine and Tobacco ☕

  • Do not consume caffeine (coffee, tea, cola, energy drinks, decaf coffee, or chocolate) for at least 24 hours before the test.
  • Do not smoke or use nicotine products for at least 24 hours prior, as nicotine alters heart rate and blood vessel dynamics.

3. Crucial Medication Instructions 💊

  • Beta-blockers and certain heart medications: Medications such as Bisoprolol, Metoprolol, Atenolol, or Carvedilol slow down the heart rate and directly counteract Dobutamine. Your referring doctor may instruct you to withhold these medications for 24 to 48 hours prior to the test.
  • Always verify with your doctor: Do not stop taking any medication unless specifically instructed by your physician.
  • Bring your complete list of medications or the actual medication boxes with you on the day of the test.

4. Clothing & Accompanying Person 👟

  • Wear comfortable, two-piece clothing (a loose top and pants) so the chest area can be easily accessed.
  • Do not apply body lotion, creams, or oils to your chest on the test day, as these prevent ECG stickers from adhering.
  • Because you may feel mildly fatigued or lightheaded afterward, we strongly recommend having a family member or caregiver accompany you to drive you home.

What to Expect During the Procedure

The total appointment time is approximately 60 to 90 minutes, with the active medication and imaging phase lasting around 15 to 20 minutes.

Step 1: Setup & Baseline Echo ➔ Step 2: Graded Dobutamine Infusion ➔ Step 3: Peak Imaging ➔ Step 4: Recovery & Monitoring
  1. Setup: You will lie on an examination bed on your left side. A small intravenous (IV) cannula will be inserted into a vein in your arm or hand. ECG electrode patches will be placed on your chest, and a blood pressure cuff will be attached to your arm.
  2. Baseline Ultrasound: The Assistant Medical Officer will apply water-soluble gel to an ultrasound probe and record baseline images of your resting heart.
  3. Graded Infusion: Dobutamine is infused through an automated syringe pump at a very low dose. Every 3 minutes, the dose is stepped up gradually to steadily increase your heart rate. If your heart rate does not reach the target, a small dose of a supplementary medication called Atropine may be administered.
  4. Continuous Ultrasound Capture: The Assistant Medical Officer will record ultrasound loops of your heart at each dosage stage (baseline, low dose, peak heart rate, and recovery).
  5. Common Sensations: During the test, it is completely normal to feel:
    • Your heart beating fast and forcefully (similar to running up a steep hill)
    • A warm, flushed sensation or mild tingling on your scalp
    • Mild breathlessness or trembling in your hands
  6. Safety & Communication: An Assistant Medical Officer will be at your bedside throughout the entire test. Inform the medical team immediately if you experience:
    • Chest pain, pressure, or tightness
    • Severe shortness of breath
    • Significant dizziness, nausea, or headache

What Happens After the Test?

  • Rapid Recovery: The Dobutamine infusion is switched off once target images are recorded. Dobutamine is rapidly cleared by the body (its effects usually wear off within 5 to 10 minutes). An antidote medication can be administered if your heart rate takes longer to settle.
  • Observation: You will remain resting on the bed while your heart rate, ECG, and blood pressure return to their baseline levels.
  • Discharge: Once stable, your IV line will be removed. You may resume your normal diet and resume your usual medications unless your doctor specifies otherwise.
  • Results: The comprehensive ultrasound loops will be compared side-by-side and analyzed by the Consultant Cardiologist. A finalized clinical report will be sent to your primary physician to discuss during your follow-up appointment.

Questions or Need to Reschedule?

📍 Location: Non-Invasive Cardiac Laboratory (NICL), Hospital Sultan Idris Shah, Jalan Puchong, 43000 Kajang, Selangor.

📞 Phone: +603-8947 5555

✉️ Email: admin@nicl.my

Versi Bahasa Melayu: Memahami Ujian Dobutamine Stress Echocardiogram (DSE)

Selamat datang ke Makmal Kardiologi Non-Invasif (NICL), Hospital Sultan Idris Shah.

Sekiranya anda atau ahli keluarga anda dijadualkan untuk menjalani ujian Dobutamine Stress Echocardiogram (DSE), panduan ini disediakan untuk menerangkan tujuan ujian, persediaan yang perlu dilakukan, serta langkah prosedur yang akan dilalui.

Apakah itu Dobutamine Stress Echocardiogram?

Dobutamine Stress Echocardiogram (DSE) ialah ujian diagnostik khas yang menggabungkan imbasan ultrabunyi jantung (ekokardiogram) dengan pemberian ubat melalui titisan salur darah (intravena/IV) yang dinamakan Dobutamine.

Secara lazimnya, keupayaan fungsi jantung di bawah tekanan fizikal dinilai menggunakan ujian senaman treadmill. Namun, bagi pesakit yang mengalami masalah sendi lutut, arthritis kronik, strok, masalah imbangan badan, atau penyakit paru-paru, senaman di atas treadmill tidak dapat dilakukan.

Ubat Dobutamine bertindak sebagai pengganti kepada senaman fizikal. Ubat ini merangsang jantung anda secara berperingkat untuk berdegup lebih laju dan mengepam dengan lebih kuat—meniru keadaan jantung seolah-olah anda sedang berlari laju, sedangkan anda hanya berbaring di atas katil pemeriksaan. Gelombang bunyi berfrekuensi tinggi (ultrabunyi) digunakan untuk merakam pergerakan otot dan injap jantung secara langsung sepanjang proses ini.

Mengapa Doktor Menyarankan Ujian Ini?

Pakar kardiologi mungkin mengesyorkan ujian DSE untuk:

  • Mendiagnosis Penyakit Saluran Darah Jantung (CAD): Mengesan saluran darah koronari yang sempit atau tersumbat yang menghalang bekalan darah mencukupi ke otot jantung ketika jantung bekerja kuat.
  • Menilai Kebolehhidupan Otot Jantung (Myocardial Viability): Memeriksa sama ada bahagian otot jantung yang lemah (contohnya selepas serangan jantung) masih berdaya pulih dengan rawatan seterusnya.
  • Menilai Tahap Kerosakan Injap Jantung: Memeriksa keterukan stenosis injap aorta (aortic stenosis) apabila aliran darah meningkat.
  • Penilaian Risiko Sebelum Pembedahan Utama: Memastikan keselamatan jantung pesakit yang berisiko tinggi sebelum menjalani pembedahan besar bukan berkaitan jantung.

Persediaan Sebelum Menjalani Ujian

1. Arahan Berpuasa 🍽️

  • Berpuasa daripada makanan pejal sekurang-kurangnya 3 hingga 4 jam sebelum temujanji.
  • Tegukan kecil air kosong dibenarkan. Berpuasa penting bagi mengelakkan rasa mual atau loya semasa ubat diberikan.

2. Elakkan Kafein dan Tembakau ☕

  • Jangan ambil sebarang produk berkafein (kopi, teh, minuman berkarbonat, minuman bertenaga, atau coklat) sekurang-kurangnya 24 jam sebelum ujian.
  • Elakkan merokok atau produk nikotin sekurang-kurangnya 24 jam sebelum ujian kerana ia mengganggu kadar denyutan jantung dan ketepatan ujian.

3. Pengambilan Ubat-ubatan Penting 💊

  • Ubat Jenis Beta-Blocker: Ubat-ubatan seperti Bisoprolol, Metoprolol, Atenolol, atau Carvedilol berfungsi melambatkan degupan jantung dan boleh menghalang tindakan ubat Dobutamine. Doktor anda mungkin menasihatkan anda untuk menangguhkan pengambilan ubat ini selama 24 hingga 48 jam sebelum ujian.
  • Penting: Jangan berhentikan sebarang ubat tanpa arahan spesifik daripada doktor yang merawat anda.
  • Sila bawa senarai ubat terkini atau bawa kesemua bungkusan ubat anda pada hari pemeriksaan.

4. Pakaian & Pengiring 👟

  • Pakai pakaian longgar dua helai (baju dan seluar berasingan) untuk memudahkan pemasangan elektrod ECG dan imbasan pada dada.
  • Elakkan menyapu losyen, krim, atau minyak pada dada pada hari ujian.
  • Oleh kerana anda mungkin berasa penat atau sedikit pening selepas ujian, anda amat digalakkan hadir bersama waris atau pengiring untuk memandu pulang.

Apa yang Berlaku Semasa Prosedur Dijalankan?

Tempoh keseluruhan temujanji mengambil masa sekitar 60 hingga 90 minit, manakala fasa pemberian ubat dan imbasan biasanya mengambil masa sekitar 15 hingga 20 minit.

  1. Penyediaan: Anda akan diminta berbaring mengiring ke sebelah kiri di atas katil pemeriksaan. Jarum tiub kecil (kanula IV) akan dipasang pada salur darah tangan anda. Pelekat elektrod ECG akan diletakkan pada dada, dan sarung pengukur tekanan darah dipasang pada lengan.
  2. Imbasan Asas: Penolong Pegawai Perubatan akan meletakkan gel pada alat transduser (probe) ultrabunyi dan merakam imej struktur serta fungsi jantung anda semasa berehat.
  3. Pemberian Ubat Secara Berperingkat: Ubat Dobutamine disalurkan melalui pam picagari elektronik pada dos rendah terlebih dahulu. Setiap 3 minit, dos akan dinaikkan sedikit demi sedikit sehingga kadar denyutan jantung mencapai sasaran. Ubat tambahan (Atropine) mungkin diberikan dalam dos kecil sekiranya kadar denyutan masih belum mencapai tahap yang diperlukan.
  4. Rakaman Imej Sepanjang Ujian: Penolong Pegawai Perubatan akan merakam imej imbasan jantung pada setiap fasa (rehat, dos rendah, dos puncak/kemuncak, dan fasa pemulihan).
  5. Gejala yang Lazim Dirasai: Sepanjang dos dinaikkan, adalah normal untuk mengalami:
    • Jantung berdegup kencang dan laju (seperti sedang menaiki bukit)
    • Rasa hangat pada badan atau rasa sedikit berdenyut di kulit kepala
    • Nafas sedikit laju atau tangan berasa sedikit gementar
  6. Keselamatan Anda: Pasukan perubatan sentiasa berada di sisi anda. Sila maklumkan kepada doktor dengan segera sekiranya anda mengalami:
    • Sakit dada, rasa ketat, atau terhimpit
    • Sesak nafas yang teruk
    • Pening kepala, melayang, rasa pitam, atau loya yang ketara

Apa yang Berlaku Selepas Ujian?

  • Pemulihan Segera: Sebaik sahaja imej puncak dirakam, infusi Dobutamine dihentikan. Kesan ubat ini akan hilang daripada badan dengan cepat (biasanya dalam masa 5 hingga 10 minit). Ubat pembalik (antidote) boleh diberikan sekiranya denyutan jantung mengambil masa untuk reda.
  • Pemantauan: Anda akan berehat di atas katil sehingga kadar denyutan jantung dan tekanan darah kembali ke paras normal.
  • Pelepasan: Jarum IV akan ditanggalkan setelah anda stabil. Anda boleh makan seperti biasa dan menyambung semula pengambilan ubat kecuali diberitahu sebaliknya oleh doktor.
  • Keputusan Ujian: Imej ultrabunyi akan dianalisis secara terperinci oleh Pakar Kardiologi. Laporan rasmi akan disediakan untuk dibincangkan oleh doktor anda semasa temujanji susulan di klinik.

Sebarang Pertanyaan atau Penjadualan Semula?

📍 Lokasi: Makmal Kardiologi Non-Invasif (NICL), Hospital Sultan Idris Shah, Jalan Puchong, 43000 Kajang, Selangor.

📞 Telefon: +603-8947 5555

✉️ Emel: admin@nicl.my

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